CCNA Part 2

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Pregunta 1 de 94

Which parameter or parameters are used to calculate OSPF cost in Cisco routers?

Selecciona una de las siguientes respuestas posibles:

Bandwidth
Bandwidth and Delay
Bandwidth, Delay, and MTU
Bandwidth, MTU, Reliability, Delay, and Load

Explicación

Pregunta 2 de 94

Why do large OSPF networks use a hierarchical design? (Choose three.)

Selecciona una o más de las siguientes respuestas posibles:

To decrease latency by increasing bandwidth
To reduce routing overhead
To speed up convergence
To confine network instability to single areas of the network
To reduce the complexity of router configuration
To lower costs by replacing routers with distribution layer switches

Explicación

Pregunta 3 de 94

Which command encrypts all plaintext passwords?

Selecciona una de las siguientes respuestas posibles:

Router# service password-encryption
Router(config)# password-encryption
Router(config)# service password-encryption
Router# password-encryption

Explicación

Pregunta 4 de 94

Which two are advantages of static routing when compared to dynamic routing? (Choose two.)

Selecciona una o más de las siguientes respuestas posibles:

Configuration complexity decreases as network size increases.
Security increases because only the network administrator may change the routing table.
Route summarization is computed automatically by the router.
Routing tables adapt automatically to topology changes.
An efficient algorithm is used to build routing tables, using automatic updates.
Routing updates are automatically sent to neighbors.
Routing traffic load is reduced when used in stub network links.

Explicación

Pregunta 5 de 94

A network administrator needs to allow only one Telnet connection to a router. For anyone viewing the configuration and issuing the show run command, the password for Telnet access should be encrypted. Which set of commands will accomplish this task?

Selecciona una de las siguientes respuestas posibles:

service password-encryption
access-list 1 permit 192.168.1.0 0.0.0.255
line vty 0 4
login
password cisco
access-class 1
enable password secret
line vty 0
login
password cisco
service password-encryption
line vty 1
login
password cisco
service password-encryption
line vty 0 4
login
password cisco

Explicación

Pregunta 6 de 94

What is the effect of using the service password-encryption command?

Selecciona una de las siguientes respuestas posibles:

Only the enable password will be encrypted.
Only the enable secret password will be encrypted.
Only passwords configured after the command has been entered will be encrypted.
It will encrypt the secret password and remove the enable secret password from the
configuration.
It will encrypt all current and future passwords.

Explicación

Pregunta 7 de 94

What is the effect of the configuration that is shown?

Selecciona una de las siguientes respuestas posibles:

It configures SSH globally for all logins.
It tells the router or switch to try to establish an SSh connection first and if that fails to use Telnet.
It configures the virtual terminal lines with the password 030752180500.
It configures a Cisco network device to use the SSH protocol on incoming communications via the virtual terminal ports.
It allows seven failed login attempts before the VTY lines are temporarily shutdown.

Explicación

Pregunta 8 de 94

What is the reason that the interface status is "administratively down, line protocol down"?

Selecciona una de las siguientes respuestas posibles:

There is no encapsulation type configured.
There is a mismatch in encapsulation types.
The interface is not receiving any keepalives.
The interface has been configured with the shutdown command.
The interface needs to be configured as a DTE device.
The wrong type of cable is connected to the interface.

Explicación

Pregunta 9 de 94

A router has learned three possible routes that could be used to reach a destination network. One route is from EIGRP and has a composite metric of 20514560. Another route is from OSPF with a metric of 782. The last is from RIPv2 and has a metric of 4. Which route or routes will the router install in the routing table?

Selecciona una de las siguientes respuestas posibles:

The OSPF route
The EIGRP route
The RIPv2 route
All three routes
The OSPF and RIPv2 routes

Explicación

Pregunta 10 de 94

A network administrator is troubleshooting an EIGRP problem on a router and needs to confirm the IP addresses of the devices with which the router has established adjacency. The retransmit interval and the queue counts for the adjacent routers also need to be checked. What command will display the required information?

Selecciona una de las siguientes respuestas posibles:

Router# show ip eigrp adjacency
Router# show ip eigrp topology
Router# show ip eigrp interfaces
Router# show ip eigrp neighbors

Explicación

Pregunta 11 de 94

R1 is unable to establish an OSPF neighbor relationship with R3. What are possible reasons for this problem? (Choose two.)

Selecciona una o más de las siguientes respuestas posibles:

All of the routers need to be configured for backbone Area 1.
R1 and R2 are the DR and BDR, so OSPF will not establish neighbor adjacency with R3.
A static route has been configured from R1 to R3 and prevents the neighbor adjacency from being established.
The hello and dead interval timers are not set to the same values on R1 and R3.
EIGRP is also configured on these routers with a lower administrative distance.
R1 and R3 are configured in different areas.

Explicación

Pregunta 12 de 94

What is a global command?

Selecciona una de las siguientes respuestas posibles:

A command that is set once and affects the entire router
A command that is implemented in all foreign and domestic IOS versions
A command that is universal in application and supports all protocols
A command that is available in every release of IOS, regardless of the version or deployment status
A command that can be entered in any configuration mode

Explicación

Pregunta 13 de 94

A Cisco router is booting and has just completed the POST process. It is now ready to find and load an IOS image. What function does the router perform next?

Selecciona una de las siguientes respuestas posibles:

It checks the configuration register.
It attempts to boot from a TFTP server.
It loads the first image file in flash memory.
It inspects the configuration file in NVRAM for boot instructions.

Explicación

Pregunta 14 de 94

What is the meaning of the output MTU 1500 bytes?

Selecciona una de las siguientes respuestas posibles:

The maximum number of bytes that can traverse this interface per second is 1500.
The minimum segment size that can traverse this interface is 1500 bytes.
The maximum segment size that can traverse this interface is 1500 bytes.
The minimum packet size that can traverse this interface is 1500 bytes.
The maximum packet size that can traverse this interface is 1500 bytes.
The maximum frame size that can traverse this interface is 1500 bytes.

Explicación

Pregunta 15 de 94

On a corporate network, hosts on the same VLAN can communicate with each other, but they are unable to communicate with hosts on different VLANs. What is needed to allow communication between the VLANs?

Selecciona una de las siguientes respuestas posibles:

A router with subinterfaces configured on the physical interface that is connected to the switch
A router with an IP address on the physical interface connected to the switch
A switch with an access link that is configured between the switches
A switch with a trunk link that is configured between the switches

Explicación

Pregunta 16 de 94

Which command displays CPU utilization?

Selecciona una de las siguientes respuestas posibles:

show protocols
show process
show system
show version

Explicación

Pregunta 17 de 94

What two things will a router do when running a distance vector routing protocol? (Choose two.)

Selecciona una o más de las siguientes respuestas posibles:

Send periodic updates regardless of topology changes.
Send entire routing table to all routers in the routing domain.
Use the shortest-path algorithm to the determine best path.
Update the routing table based on updates from their neighbors.
Maintain the topology of the entire network in its database.

Explicación

Pregunta 18 de 94

Which command is used to display the collection of OSPF link states?

Selecciona una o más de las siguientes respuestas posibles:

show ip ospf link-state
show ip ospf lsa database
show ip ospf neighbors
show ip ospf database

Explicación

Pregunta 19 de 94

The technician wants to upload a new IOS in the router while keeping the existing IOS. What is the maximum size of an IOS file that could be loaded if the original IOS is also kept in flash?

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 20 de 94

The two exhibited devices are the only Cisco devices on the network. The serial network between the two devices has a mask of 255.255.255.252. Given the output that is shown, what three statements are true of these devices? (Choose three.)

Selecciona una o más de las siguientes respuestas posibles:

The Manchester serial address is 10.1.1.1
The Manchester serial address is 10.1.1.2
The London router is a Cisco 2610.
The Manchester router is a Cisco 2610.
The CDP information was received on port Serial0/0 of the Manchester router.
The CDP information was sent by port Serial0/0 of the London router.

Explicación

Pregunta 21 de 94

If IP routing is enabled, which two commands set the gateway of last resort to the default gateway? (Choose two.)

Selecciona una o más de las siguientes respuestas posibles:

ip default-gateway 0.0.0.0
ip route 172.16.2.1 0.0.0.0 0.0.0.0
ip default-network 0.0.0.0
ip default-route 0.0.0.0 0.0.0.0 172.16.2.1
ip route 0.0.0.0 0.0.0.0 172.16.2.1

Explicación

Pregunta 22 de 94

Which parameter would you tune to affect the selection of a static route as a backup, when a dynamic protocol is also being used?

Selecciona una de las siguientes respuestas posibles:

hop count
administrative distance
link bandwidth
link delay
link cost

Explicación

Pregunta 23 de 94

A network associate has configured OSPF with the command:
City(config-router)# network 192.168.12.64 0.0.0.63 area 0

After completing the configuration, the associate discovers that not all the interfaces are participating in OSPF. Which three of the interfaces shown in the exhibit will participate in OSPF according to this configuration statement? (Choose three.)

Selecciona una o más de las siguientes respuestas posibles:

FastEthernet0 /0
FastEthernet0 /1
Serial0/0
Serial0/1.102
Serial0/1.103
Serial0/1.104

Explicación

Pregunta 24 de 94

The Lakeside Company has the internetwork in the exhibit. The administrator would like to reduce the size of the routing table on the Central router. Which partial routing table entry in the Central router represents a route summary that represents the LANs in Phoenix but no additional subnets?

Selecciona una de las siguientes respuestas posibles:

10.0.0.0/22 is subnetted, 1 subnets
D 10.0.0.0 [90/20514560] via 10.2.0.2, 6w0d, Serial0/1
10.0.0.0/28 is subnetted, 1 subnets
D 10.2.0.0 [90/20514560] via 10.2.0.2, 6w0d, Serial0/1
10.0.0.0/30 is subnetted, 1 subnets
D 10.2.2.0 [90/20514560] via 10.2.0.2, 6w0d, Serial0/1
10.0.0.0/22 is subnetted, 1 subnets
D 10.4.0.0 [90/20514560] via 10.2.0.2, 6w0d, Serial0/1
10.0.0.0/28 is subnetted, 1 subnets
D 10.4.4.0 [90/20514560] via 10.2.0.2, 6w0d, Serial0/1
10.0.0.0/30 is subnetted, 1 subnets
D 10.4.4.4 [90/20514560] via 10.2.0.2, 6w0d, Serial0/1

Explicación

Pregunta 25 de 94

A static route to the 10.5.6.0/24 network is to be configured on the HFD router. Which commands will accomplish this? (Choose two.)

Selecciona una o más de las siguientes respuestas posibles:

HFD(config)# ip route 10.5.6.0 0.0.0.255 fa0/0
HFD(config)# ip route 10.5.6.0 0.0.0.255 10.5.4.6
HFD(config)# ip route 10.5.6.0 255.255.255.0 fa0/0
HFD(config)# ip route 10.5.6.0 255.255.255.0 10.5.4.6
HFD(config)# ip route 10.5.4.6 0.0.0.255 10.5.6.0
HFD(config)# ip route 10.5.4.6 255.255.255.0 10.5.6.0

Explicación

Pregunta 26 de 94

Before installing a new, upgraded version of the IOS, what should be checked on the router, and which command should be used to gather this information? (Choose two.)

Selecciona una o más de las siguientes respuestas posibles:

The amount of available ROM
The amount of available flash and RAM memory
The version of the bootstrap software present on the router
show version
show processes
show running-config

Explicación

Pregunta 27 de 94

Which command reveals the last method used to powercycle a router?

Selecciona una de las siguientes respuestas posibles:

show reload
show boot
show running-config
show version

Explicación

Pregunta 28 de 94

Which command would you use on a Cisco router to verify the Layer 3 path to a host?

Selecciona una de las siguientes respuestas posibles:

tracert address
traceroute address
telnet address
ssh address

Explicación

Pregunta 29 de 94

What information does a router running a link-state protocol use to build and maintain its topological database? (Choose two.)

Selecciona una o más de las siguientes respuestas posibles:

hello packets
SAP messages sent by other routers
LSAs from other routers
beacons received on point-to-point links
routing tables received from other link-state routers
TTL packets from designated routers

Explicación

Pregunta 30 de 94

Which statements describe the routing protocol OSPF? (Choose three.)

Selecciona una o más de las siguientes respuestas posibles:

It supports VLSM
It is used to route between autonomous systems.
It confines network instability to one area of the network.
It increases routing overhead on the network.
It allows extensive control of routing updates.
It is simpler to configure than RIP v2.

Explicación

Pregunta 31 de 94

A network administrator configures a new router and enters the copy startup-config running-config command on the router. The network administrator powers down the router and sets it up at a remote location. When the router starts, it enters the system configuration dialog as shown. What is the cause of the problem?

Selecciona una de las siguientes respuestas posibles:

The network administrator failed to save the configuration.
The configuration register is set to 0x2100.
The boot system flash command is missing from the configuration.
The configuration register is set to 0x2102.
The router is configured with the boot system startup command.

Explicación

Pregunta 32 de 94

What is the default administrative distance of OSPF?

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 33 de 94

Which characteristics are representative of a link-state routing protocol? (Choose three.)

Selecciona una o más de las siguientes respuestas posibles:

Provides common view of entire topology
Exchanges routing tables with neighbors
Calculates shortest path
Utilizes event-triggered updates
Utilizes frequent periodic updates

Explicación

Pregunta 34 de 94

Based on the exhibited routing table, how will packets from a host within the 192.168.10.192/26 LAN be forwarded to 192.168.10.1?

Selecciona una de las siguientes respuestas posibles:

The router will forward packets from R3 to R2 to R1.
The router will forward packets from R3 to R1 to R2.
The router will forward packets from R3 to R2 to R1 AND from R3 to R1.
The router will forward packets from R3 to R1.

Explicación

Pregunta 35 de 94

C-router is to be used as a "router-on-a-stick" to route between the VLANs. All the interfaces have been properly configured and IP routing is operational. The hosts in the VLANs have been configured with the appropriate default gateway. What is true about this configuration?

Selecciona una de las siguientes respuestas posibles:

These commands need to be added to the configuration:
C-router(config)# router eigrp 123
C-router(config-router)# network 172.19.0.0
These commands need to be added to the configuration:
C-router(config)# router ospf 1
C-router(config-router)# network 172.19.0.0 0.0.3.255 area 0
These commands need to be added to the configuration:
C-router(config)# router rip
C-router(config-router)# network 172.19.0.0
No further routing configuration is required.

Explicación

Pregunta 36 de 94

Why is flash memory erased prior to upgrading the IOS image from the TFTP server?

Selecciona una de las siguientes respuestas posibles:

The router cannot verify that the Cisco IOS image currently in flash is valid.
Flash memory on Cisco routers can contain only a single IOS image.
Erasing current flash content is requested during the copy dialog.
In order for the router to use the new image as the default, it must be the only IOS image in
flash.

Explicación

Pregunta 37 de 94

The speed of all serial links is E1 and the speed of all Ethernet links is 100 Mb/s. A static route will be established on the Manchester router to direct traffic toward the Internet over the most direct path available. What configuration on the Manchester router will establish a route toward the Internet for traffic that originates from workstations on the Manchester LAN?

Selecciona una de las siguientes respuestas posibles:

ip route 0.0.0.0 255.255.255.0 172.16.100.2
ip route 0.0.0.0 0.0.0.0 128.107.1.1
ip route 0.0.0.0 255.255.255.252 128.107.1.1
ip route 0.0.0.0 0.0.0.0 172.16.100.1
ip route 0.0.0.0 0.0.0.0 172.16.100.2
ip route 0.0.0.0 255.255.255.255 172.16.100.2

Explicación

Pregunta 38 de 94

The network administrator must establish a route by which London workstations can forward traffic to the Manchester workstations. What is the simplest way to accomplish this?

Selecciona una de las siguientes respuestas posibles:

Configure a dynamic routing protocol on London to advertise all routes to Manchester.
Configure a dynamic routing protocol on London to advertise summarized routes to Manchester.
Configure a dynamic routing protocol on Manchester to advertise a default route to the London router.
Configure a static default route on London with a next hop of 10.1.1.1.
Configure a static route on London to direct all traffic destined for 172.16.0.0/22 to 10.1.1.2.
Configure Manchester to advertise a static default route to London.

Explicación

Pregunta 39 de 94

The network administrator requires easy configuration options and minimal routing protocol traffic. What two options provide adequate routing table information for traffic that passes between the two routers and satisfy the requests of the network administrator? (Choose two.)

Selecciona una o más de las siguientes respuestas posibles:

a dynamic routing protocol on InternetRouter to advertise all routes to CentralRouter.
a dynamic routing protocol on InternetRouter to advertise summarized routes to CentralRouter.
a static route on InternetRouter to direct traffic that is destined for 172.16.0.0/16 to CentralRouter.
a dynamic routing protocol on CentralRouter to advertise all routes to InternetRouter.
a dynamic routing protocol on CentralRouter to advertise summarized routes to InternetRouter.
a static, default route on CentralRouter that directs traffic to InternetRouter.

Explicación

Pregunta 40 de 94

When running OSPF, what would cause router A not to form an adjacency with router B?

Selecciona una de las siguientes respuestas posibles:

The loopback addresses are on different subnets.
The values of the dead timers on the routers are different.
Route summarization is enabled on both routers.
The process identifier on router A is different than the process identifier on router B.

Explicación

Pregunta 41 de 94

The company uses EIGRP as the routing protocol. What path will packets take from a host on the 192.168.10.192/26 network to a host on the LAN attached to router R1?

Selecciona una de las siguientes respuestas posibles:

The path of the packets will be R3 to R2 to R1.
The path of the packets will be R3 to R1 to R2.
The path of the packets will be both R3 to R2 to R1 AND R3 to R1.
The path of the packets will be R3 to R1.

Explicación

Pregunta 42 de 94

When running EIGRP, what is required for RouterA to exchange routing updates with RouterC?

Selecciona una de las siguientes respuestas posibles:

AS numbers must be changed to match on all the routers
Loopback interfaces must be configured so a DR is elected
The no auto-summary command is needed on Router A and Router C
Router B needs to have two network statements, one for each connected network

Explicación

Pregunta 43 de 94

Which command would you configure globally on a Cisco router that would allow you to view directly connected Cisco devices?

Selecciona una de las siguientes respuestas posibles:

enable cdp
cdp enable
cdp run
run cdp

Explicación

Pregunta 44 de 94

According to the routing table, where will the router send a packet destined for 10.1.5.65?

Selecciona una de las siguientes respuestas posibles:

10.1.1.2
10.1.2.2
10.1.3.3
10.1.4.4

Explicación

Pregunta 45 de 94

Which address and mask combination represents a summary of the routes learned by EIGRP?

Selecciona una de las siguientes respuestas posibles:

192.168.25.0 255.255.255.240
192.168.25.0 255.255.255.252
192.168.25.16 255.255.255.240
192.168.25.16 255.255.255.252
192.168.25.28 255.255.255.240
192.168.25.28 255.255.255.252

Explicación

Pregunta 46 de 94

Assuming that the entire network topology is shown, what is the operational status of the interfaces of R2 as indicated by the command output shown?

Selecciona una de las siguientes respuestas posibles:

One interface has a problem.
Two interfaces have problems.
The interfaces are functioning correctly.
The operational status of the interfaces cannot be determined from the output shown.

Explicación

Pregunta 47 de 94

Which two locations can be configured as a source for the IOS image in the boot system command? (Choose two.)

Selecciona una o más de las siguientes respuestas posibles:

RAM
NVRAM
flash memory
HTTP server
TFTP server
Telnet server

Explicación

Pregunta 48 de 94

Given the output for this command, if the router ID has not been manually set, what router ID will OSPF use for this router?

Selecciona una de las siguientes respuestas posibles:

10.1.1.2
10.154.154.1
172.16.5.1
192.168.5.3

Explicación

Pregunta 49 de 94

What commands must be configured on the 2950 switch and the router to allow communication between host 1 and host 2? (Choose two.)

Selecciona una o más de las siguientes respuestas posibles:

Router(config)# interface fastethernet 0/0
Router(config-if)# ip address 192.168.1.1 255.255.255.0
Router(config-if)# no shut down
Router(config)# interface fastethernet 0/0
Router(config-if)# no shut down
Router(config)# interface fastethernet 0/0.1
Router(config-subif)# encapsulation dot1q 10
Router(config-subif)# ip address 192.168.10.1 255.255.255.0
Router(config)# interface fastethernet 0/0.2
Router(config-subif)# encapsulation dot1q 20
Router(config-subif)# ip address 192.168.20.1 255.255.255.0
Router(config)# router eigrp 100
Router(config-router)# network 192.168.10.0
Router(config-router)# network 192.168.20.0
Switch1(config)# vlan database
Switch1(config-vlan)# vtp domain XYZ
Switch1(config-vlan)# vtp server
Switch1(config)# interface fastethernet 0/1
Switch1(config-if)# switchport mode trunk
Switch1(config)# interface vlan 1
Switch1(config-if)# ip default-gateway 192.168.1.1

Explicación

Pregunta 50 de 94

Which two statements describe the process identifier that is used in the command to configure OSPF on a router? (Choose two.)
Router(config)# router ospf 1

Selecciona una o más de las siguientes respuestas posibles:

All OSPF routers in an area must have the same process ID.
Only one process number can be used on the same router.
Different process identifiers can be used to run multiple OSPF processes
The process number can be any number from 1 to 65,535.
Hello packets are sent to each neighbor to determine the processor identifier.

Explicación

Pregunta 51 de 94

For what two reasons has the router loaded its IOS image from the location that is shown?
(Choose two.)

Selecciona una o más de las siguientes respuestas posibles:

Router1 has specific boot system commands that instruct it to load IOS from a TFTP server.
Router1 is acting as a TFTP server for other routers.
Router1 cannot locate a valid IOS image in flash memory.
Router1 defaulted to ROMMON mode and loaded the IOS image from a TFTP server.
Cisco routers will first attempt to load an image from TFTP for management purposes.

Explicación

Pregunta 52 de 94

What can be determined about the router from the console output?

Selecciona una de las siguientes respuestas posibles:

No configuration file was found in NVRAM.
No configuration file was found in flash.
No configuration file was found in the PCMCIA card.
Configuration file is normal and will load in 15 seconds.

Explicación

Pregunta 53 de 94

Which three elements must be used when you configure a router interface for VLAN trunking?
(Choose three.)

Selecciona una o más de las siguientes respuestas posibles:

one physical interface for each subinterface
one IP network or subnetwork for each subinterface
a management domain for each subinterface
subinterface encapsulation identifiers that match VLAN tags
one subinterface per VLAN
subinterface numbering that matches VLAN tags

Explicación

Pregunta 54 de 94

Which commands are required to properly configure a router to run OSPF and to add network 192.168.16.0/24 to OSPF area 0? (Choose two.)

Selecciona una o más de las siguientes respuestas posibles:

Router(config)# router ospf 0
Router(config)# router ospf 1
Router(config)# router ospf area 0
Router(config-router)# network 192.168.16.0 0.0.0.255 0
Router(config-router)# network 192.168.16.0 0.0.0.255 area 0
Router(config-router)# network 192.168.16.0 255.255.255.0 area 0

Explicación

Pregunta 55 de 94

A router receives information about network 192.168.10.0/24 from multiple sources. What will the router consider the most reliable information about the path to that network?

Selecciona una de las siguientes respuestas posibles:

a directly connected interface with an address of 192.168.10.254/24
a static route to network 192.168.10.0/24
a RIP update for network 192.168.10.0/24
an OSPF update for network 192.168.0.0/16
a default route with a next hop address of 192.168.10.1
a static route to network 192.168.10.0/24 with a local serial interface configured as the next hop

Explicación

Pregunta 56 de 94

What is the default maximum number of equal-cost paths that can be placed into the routing table of a Cisco OSPF router?

Selecciona una de las siguientes respuestas posibles:

2
8
16
Unlimited

Explicación

Pregunta 57 de 94

What is the default maximum number of equal-cost paths that can be placed into the routing table of a Cisco OSPF router?

Selecciona una de las siguientes respuestas posibles:

2
8
16
Unlimited

Explicación

Pregunta 58 de 94

Which command shows your active Telnet connections?

Selecciona una de las siguientes respuestas posibles:

show cdp neigbors
show session
show users
show vty logins

Explicación

Pregunta 59 de 94

Which type of EIGRP route entry describes a feasible successor?

Selecciona una de las siguientes respuestas posibles:

a backup route, stored in the routing table
a primary route, stored in the routing table
a backup route, stored in the topology table
a primary route, stored in the topology table

Explicación

Pregunta 60 de 94

The network administrator cannot connect to Switch1 over a Telnet session, although the hosts attached to Switch1 can ping the interface Fa0/0 of the router. Given the information in the graphic and assuming that the router and Switch2 are configured properly, which of the following commands should be issued on Switch1 to correct this problem?

Selecciona una de las siguientes respuestas posibles:

Switch1(config)# line con0
Switch1(config-line)# password cisco
Switch1(config-line)#login
Switch1(config)# interface fa0/1
Switch1(config-if)# ip address 192.168.24.3 255.255.255.0
Switch1(config)# ip default-gateway 192.168.24.1
Switch1(config)# interface fa0/1
Switch1(config-if)# duplex full
Switch1(config-if)# speed 100
Switch1(config)# interface fa0/1
Switch1(config-if)# switchport mode trunk

Explicación

Pregunta 61 de 94

Which of these statements correctly describes the state of the switch once the boot process has been completed?

Selecciona una de las siguientes respuestas posibles:

As FastEthernet0/12 will be the last to come up, it will be blocked by STP.
Remote access management of this switch will not be possible without configuration change.
More VLANs will need to be created for this switch.
The switch will need a different IOS code in order to support VLANs and STP.

Explicación

Pregunta 62 de 94

Two routers named Atlanta and Brevard are connected via their serial interfaces as illustrated, but they are unable to communicate. The Atlanta router is known to have the correct configuration.
Given the partial configurations, identify the fault on the Brevard router that is causing the lack of connectivity.

Selecciona una de las siguientes respuestas posibles:

incompatible IP address
insufficient bandwidth
incorrect subnet mask
incompatible encapsulation
link reliability too low
IPCP closed

Explicación

Pregunta 63 de 94

Users on the 172.17.22.0 network cannot reach the server located on the 172.31.5.0 network. The network administrator connected to router Coffee via the console port, issued the show ip route command, and was able to ping the server.
Based on the output of the show ip route command and the topology shown in the graphic, what is the cause of the failure?

Selecciona una de las siguientes respuestas posibles:

The network has not fully converged.
IP routing is not enabled.
A static route is configured incorrectly.
The FastEthernet interface on Coffee is disabled.
The neighbor relationship table is not correctly updated.
The routing table on Coffee has not updated

Explicación

Pregunta 64 de 94

A network administrator is trying to add a new router into an established OSPF network. The networks attached to the new router do not appear in the routing tables of the other OSPF routers. Given the information in the partial configuration shown below, what configuration error is causing this problem?
Router(config)# router ospf 1
Router(config-router)# network 10.0.0.0 255.0.0.0 area 0

Selecciona una de las siguientes respuestas posibles:

The process id is configured improperly.
The OSPF area is configured improperly.
The network wildcard mask is configured improperly.
The network number is configured improperly.
The AS is configured improperly.
The network subnet mask is configured improperly.

Explicación

Pregunta 65 de 94

A network administrator is trying to add a new router into an established OSPF network. The networks attached to the new router do not appear in the routing tables of the other OSPF routers. Given the information in the partial configuration shown below, what configuration error is causing this problem?
Router(config)# router ospf 1
Router(config-router)# network 10.0.0.0 255.0.0.0 area 0

Selecciona una de las siguientes respuestas posibles:

The process id is configured improperly.
The OSPF area is configured improperly.
The network wildcard mask is configured improperly.
The network number is configured improperly.
The AS is configured improperly.
The network subnet mask is configured improperly.

Explicación

Pregunta 66 de 94

Which statement is correct regarding the operation of DHCP?

Selecciona una de las siguientes respuestas posibles:

A DHCP client uses a ping to detect address conflicts.
A DHCP server uses a gratuitous ARP to detect DHCP clients.
A DHCP client uses a gratuitous ARP to detect a DHCP server.
If an address conflict is detected, the address is removed from the pool and an administrator must resolve the conflict.
If an address conflict is detected, the address is removed from the pool for an amount of time configurable by the administrator.
If an address conflict is detected, the address is removed from the pool and will not be reused until the server is rebooted.

Explicación

Pregunta 67 de 94

What statement is true of the configuration for this network?

Selecciona una de las siguientes respuestas posibles:

The configuration that is shown provides inadequate outside address space for translation of the number of inside addresses that are supported.
Because of the addressing on interface FastEthernet0/1, the Serial0/0 interface address will not support the NAT configuration as shown.
The number 1 referred to in the ip nat inside source command references access-list number 1.
ExternalRouter must be configured with static routes to networks 172.16.1.0/24 and 172.16.2.0/24.

Explicación

Pregunta 68 de 94

Which statement describes the process of dynamically assigning IP addresses by the DHCP server?

Selecciona una de las siguientes respuestas posibles:

Addresses are allocated after a negotiation between the server and the host to determine the length of the agreement.
Addresses are permanently assigned so that the hosts uses the same address at all times.
Addresses are assigned for a fixed period of time, at the end of the period, a new request for an address must be made.
Addresses are leased to hosts, which periodically contact the DHCP server to renew the lease.

Explicación

Pregunta 69 de 94

What are two benefits of using NAT? (Choose two.)

Selecciona una o más de las siguientes respuestas posibles:

NAT facilitates end-to-end communication when IPsec is enabled.
NAT eliminates the need to re-address all hosts that require external access.
NAT conserves addresses through host MAC-level multiplexing.
Dynamic NAT facilitates connections from the outside of the network.
NAT accelerates the routing process because no modifications are made on the packets.
NAT protects network security because private networks are not advertised.

Explicación

Pregunta 70 de 94

What are two benefits of using NAT? (Choose two.)

Selecciona una o más de las siguientes respuestas posibles:

NAT facilitates end-to-end communication when IPsec is enabled.
NAT eliminates the need to re-address all hosts that require external access.
NAT conserves addresses through host MAC-level multiplexing.
Dynamic NAT facilitates connections from the outside of the network.
NAT accelerates the routing process because no modifications are made on the packets.
NAT protects network security because private networks are not advertised.

Explicación

Pregunta 71 de 94

On which options are standard access lists based?

Selecciona una de las siguientes respuestas posibles:

destination address and wildcard mask
destination address and subnet mask
source address and subnet mask
source address and wildcard mask

Explicación

Pregunta 72 de 94

A network engineer wants to allow a temporary entry for a remote user with a specific username and password so that the user can access the entire network over the Internet. Which ACL can be used?

Selecciona una de las siguientes respuestas posibles:

standard
extended
dynamic
reflexive

Explicación

Pregunta 73 de 94

How does a DHCP server dynamically assign IP addresses to hosts?

Selecciona una de las siguientes respuestas posibles:

Addresses are permanently assigned so that the host uses the same address at all times.
Addresses are assigned for a fixed period of time. At the end of the period, a new request for an address must be made, and another address is then assigned.
Addresses are leased to hosts. A host will usually keep the same address by periodically contacting the DHCP server to renew the lease.
Addresses are allocated after a negotiation between the server and the host to determine the length of the agreement.

Explicación

Pregunta 74 de 94

Which rule does the DHCP server use when there is an IP address conflict?

Selecciona una de las siguientes respuestas posibles:

The address is removed from the pool until the conflict is resolved.
The address remains in the pool until the conflict is resolved.
Only the IP detected by Gratuitous ARP is removed from the pool.
Only the IP detected by Ping is removed from the pool.
The IP will be shown, even after the conflict is resolved.

Explicación

Pregunta 75 de 94

The Bigtime router is unable to authenticate to the Littletime router. What is the cause of the problem?

Selecciona una de las siguientes respuestas posibles:

The usernames are incorrectly configured on the two routers.
The passwords do not match on the two routers.
CHAP authentication cannot be used on a serial interface.
The routers cannot be connected from interface S0/0 to interface S0/0.
With CHAP authentication, one router must authenticate to another router. The routers cannot be configured to authenticate to each other.

Explicación

Pregunta 76 de 94

Which two tasks does the Dynamic Host Configuration Protocol perform? (Choose two.)

Selecciona una o más de las siguientes respuestas posibles:

Set the IP gateway to be used by the network.
Perform host discovery used DHCPDISCOVER message.
Configure IP address parameters from DHCP server to a host.
Provide an easy management of layer 3 devices.
Monitor IP performance using the DHCP server.
Assign and renew IP address from the default pool.

Explicación

Pregunta 77 de 94

When a DHCP server is configured, which two IP addresses should never be assignable to hosts?
(Choose two.)

Selecciona una o más de las siguientes respuestas posibles:

network or subnetwork IP address
broadcast address on the network
IP address leased to the LAN
IP address used by the interfaces
manually assigned address to the clients
designated IP address to the DHCP server

Explicación

Pregunta 78 de 94

Which two statements about static NAT translations are true? (Choose two.)

Selecciona una o más de las siguientes respuestas posibles:

They allow connections to be initiated from the outside.
They require no inside or outside interface markings because addresses are statically defined.
They are always present in the NAT table.
They can be configured with access lists, to allow two or more connections to be initiated from the outside.

Explicación

Pregunta 79 de 94

A network administrator needs to configure port security on a switch. Which two statements are true? (Choose two.)

Selecciona una o más de las siguientes respuestas posibles:

The network administrator can apply port security to dynamic access ports.
The network administrator can apply port security to EtherChannels.
When dynamic MAC address learning is enabled on an interface, the switch can learn new addresses, up to the maximum defined.
The sticky learning feature allows the addition of dynamically learned addresses to the running configuration.
The network administrator can configure static secure or sticky secure MAC addresses in the voice VLAN.

Explicación

Pregunta 80 de 94

A junior network administrator was given the task of configuring port security on SwitchA to allow only PC_A to access the switched network through port fa0/1. If any other device is detected, the port is to drop frames from this device. The administrator configured the interface and tested it with successful pings from PC_A to RouterA, and then observes the output from these two show commands.
Which two of these changes are necessary for SwitchA to meet the requirements? (Choose two.)

Selecciona una o más de las siguientes respuestas posibles:

Port security needs to be globally enabled.
Port security needs to be enabled on the interface.
Port security needs to be configured to shut down the interface in the event of a violation.
Port security needs to be configured to allow only one learned MAC address.
Port security interface counters need to be cleared before using the show command.
The port security configuration needs to be saved to NVRAM before it can become active.

Explicación

Pregunta 81 de 94

Which set of commands is recommended to prevent the use of a hub in the access layer?

Selecciona una de las siguientes respuestas posibles:

switch(config-if)#switchport mode trunk
switch(config-if)#switchport port-security maximum 1
switch(config-if)#switchport mode trunk
switch(config-if)#switchport port-security mac-address 1
switch(config-if)#switchport mode access
switch(config-if)#switchport port-security maximum 1
switch(config-if)#switchport mode access
switch(config-if)#switchport port-security mac-address 1

Explicación

Pregunta 82 de 94

How does using the service password-encryption command on a router provide additional security?

Selecciona una de las siguientes respuestas posibles:

by encrypting all passwords passing through the router
by encrypting passwords in the plain text configuration file
by requiring entry of encrypted passwords for access to the device
by configuring an MD5 encrypted key to be used by routing protocols to validate routing exchanges
by automatically suggesting encrypted passwords for use in configuring the router

Explicación

Pregunta 83 de 94

Statements A, B, C, and D of ACL 10 have been entered in the shown order and applied to interface E0 inbound, to prevent all hosts (except those whose addresses are the first and last IP of subnet 172.21.1.128/28) from accessing the network. But as is, the ACL does not restrict anyone from the network. How can the ACL statements be re-arranged so that the system works as intended?

Selecciona una de las siguientes respuestas posibles:

ACDB
BADC
DBAC
CDBA

Explicación

Pregunta 84 de 94

An attempt to deny web access to a subnet blocks all traffic from the subnet. Which interface command immediately removes the effect of ACL 102?

Selecciona una de las siguientes respuestas posibles:

no ip access-class 102 in
no ip access-class 102 out
no ip access-group 102 in
no ip access-group 102 out
no ip access-list 102 in

Explicación

Pregunta 85 de 94

Which Cisco Catalyst feature automatically disables the port in an operational PortFast upon receipt of a BPDU?

Selecciona una de las siguientes respuestas posibles:

BackboneFast
UplinkFast
Root Guard
BPDU Guard
BPDU Filter

Explicación

Pregunta 86 de 94

When you are troubleshooting an ACL issue on a router, which command would you use to verify which interfaces are affected by the ACL?

Selecciona una de las siguientes respuestas posibles:

show ip access-lists
show access-lists
show interface
show ip interface
list ip interface

Explicación

Pregunta 87 de 94

A network administrator cannot establish a Telnet session with the indicated router. What is the cause of this failure?

Selecciona una de las siguientes respuestas posibles:

A Level 5 password is not set.
An ACL is blocking Telnet access.
The vty password is missing.
The console password is missing.

Explicación

Pregunta 88 de 94

Which statement about access lists that are applied to an interface is true?

Selecciona una de las siguientes respuestas posibles:

You can place as many access lists as you want on any interface.
You can apply only one access list on any interface.
You can configure one access list, per direction, per Layer 3 protocol.
You can apply multiple access lists with the same protocol or in different directions.

Explicación

Pregunta 89 de 94

Which item represents the standard IP ACL?

Selecciona una de las siguientes respuestas posibles:

access-list 110 permit ip any any
access-list 50 deny 192.168.1.1 0.0.0.255
access list 101 deny tcp any host 192.168.1.1
access-list 2500 deny tcp any host 192.168.1.1 eq 22

Explicación

Pregunta 90 de 94

A network administrator is configuring ACLs on a Cisco router, to allow traffic from hosts on networks 192.168.146.0, 192.168.147.0, 192.168.148.0, and 192.168.149.0 only. Which two ACL statements, when combined, would you use to accomplish this task? (Choose two.)

Selecciona una o más de las siguientes respuestas posibles:

access-list 10 permit ip 192.168.146.0 0.0.1.255
access-list 10 permit ip 192.168.147.0 0.0.255.255
access-list 10 permit ip 192.168.148.0 0.0.1.255
access-list 10 permit ip 192.168.149.0 0.0.255.255
access-list 10 permit ip 192.168.146.0 0.0.0.255
access-list 10 permit ip 192.168.146.0 255.255.255.0

Explicación

Pregunta 91 de 94

What can be done to secure the virtual terminal interfaces on a router? (Choose two.)

Selecciona una o más de las siguientes respuestas posibles:

Administratively shut down the interface.
Physically secure the interface.
Create an access list and apply it to the virtual terminal interfaces with the access-group command.
Configure a virtual terminal password and login process.
Enter an access list and apply it to the virtual terminal interfaces using the access-class command.

Explicación

Pregunta 92 de 94

Which two commands correctly verify whether port security has been configured on port FastEthernet 0/12 on a switch? (Choose two.)

Selecciona una o más de las siguientes respuestas posibles:

SW1#show port-secure interface FastEthernet 0/12
SW1#show switchport port-secure interface FastEthernet 0/12
SW1#show running-config
SW1#show port-security interface FastEthernet 0/12
SW1#show switchport port-security interface FastEthernet 0/12

Explicación

Pregunta 93 de 94

The following commands are executed on interface fa0/1 of 2950Switch.
2950Switch(config-if)# switchport port-security
2950Switch(config-if)# switchport port-security mac-address sticky
2950Switch(config-if)# switchport port-security maximum 1
The Ethernet frame that is shown arrives on interface fa0/1. What two functions will occur when this frame is received by 2950Switch? (Choose two.)

Selecciona una o más de las siguientes respuestas posibles:

The MAC address table will now have an additional entry of fa0/1 FFFF.FFFF.FFFF.
Only host A will be allowed to transmit frames on fa0/1.
This frame will be discarded when it is received by 2950Switch.
All frames arriving on 2950Switch with a destination of 0000.00aa.aaaa will be forwarded out fa0/1.
Hosts B and C may forward frames out fa0/1 but frames arriving from other switches will not be forwarded out fa0/1.
Only frames from source 0000.00bb.bbbb, the first learned MAC address of 2950Switch, will be forwarded out fa0/1.

Explicación

Pregunta 94 de 94

What will be the result if the following configuration commands are implemented on a Cisco switch?
Switch(config-if)# switchport port-security
Switch(config-if)# switchport port-security mac-address sticky

Selecciona una de las siguientes respuestas posibles:

A dynamically learned MAC address is saved in the startup-configuration file.
A dynamically learned MAC address is saved in the running-configuration file.
A dynamically learned MAC address is saved in the VLAN database.
Statically configured MAC addresses are saved in the startup-configuration file if frames from that address are received.
Statically configured MAC addresses are saved in the running-configuration file if frames from that address are received.

Explicación

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	Creado por Axiom42 hace casi 10 años

Practice exam for 200-120 exam Questions for the following Topics Topic 4: IP Routing Technologies Topic 5: IP Services Topic 6: Network Device Security

CCNA Part 2

Pregunta 1 de 94

Which parameter or parameters are used to calculate OSPF cost in Cisco routers?

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 2 de 94

Why do large OSPF networks use a hierarchical design? (Choose three.)

Selecciona una o más de las siguientes respuestas posibles:

Explicación

Pregunta 3 de 94

Which command encrypts all plaintext passwords?

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 4 de 94

Which two are advantages of static routing when compared to dynamic routing? (Choose two.)

Selecciona una o más de las siguientes respuestas posibles:

Explicación

Pregunta 5 de 94

A network administrator needs to allow only one Telnet connection to a router. For anyone viewing the configuration and issuing the show run command, the password for Telnet access should be encrypted. Which set of commands will accomplish this task?

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 6 de 94

What is the effect of using the service password-encryption command?

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 7 de 94

What is the effect of the configuration that is shown?

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 8 de 94

What is the reason that the interface status is "administratively down, line protocol down"?

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 9 de 94

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 10 de 94

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 11 de 94

R1 is unable to establish an OSPF neighbor relationship with R3. What are possible reasons for this problem? (Choose two.)

Selecciona una o más de las siguientes respuestas posibles:

Explicación

Pregunta 12 de 94

What is a global command?

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 13 de 94

A Cisco router is booting and has just completed the POST process. It is now ready to find and load an IOS image. What function does the router perform next?

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 14 de 94

What is the meaning of the output MTU 1500 bytes?

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 15 de 94

On a corporate network, hosts on the same VLAN can communicate with each other, but they are unable to communicate with hosts on different VLANs. What is needed to allow communication between the VLANs?

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 16 de 94

Which command displays CPU utilization?

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 17 de 94

What two things will a router do when running a distance vector routing protocol? (Choose two.)

Selecciona una o más de las siguientes respuestas posibles:

Explicación

Pregunta 18 de 94

Which command is used to display the collection of OSPF link states?

Selecciona una o más de las siguientes respuestas posibles:

Explicación

Pregunta 19 de 94

The technician wants to upload a new IOS in the router while keeping the existing IOS. What is the maximum size of an IOS file that could be loaded if the original IOS is also kept in flash?

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 20 de 94

The two exhibited devices are the only Cisco devices on the network. The serial network between the two devices has a mask of 255.255.255.252. Given the output that is shown, what three statements are true of these devices? (Choose three.)

Selecciona una o más de las siguientes respuestas posibles:

Explicación