Examen CCNA Certificacion Test

Pregunta 1 de 43

1

Which layer in the OSI reference model is responsible for determining the availability of the receiving program and checking to see if enough resources exist for that communication?

Selecciona una de las siguientes respuestas posibles:

transport
network
presentation
session
application

Explicación

Pregunta 2 de 43

1

A network interface port has collision detection and carrier sensing enabled on a shared twisted pair network. From this statement, what is known about the network interface port?

Selecciona una de las siguientes respuestas posibles:

This is a 10 Mb/s switch port.
This is a 100 Mb/s switch port.
This is an Ethernet port operating at half duplex.
This is an Ethernet port operating at full duplex.
This is a port on a network interface card in a PC.

Explicación

Pregunta 3 de 43

1

A receiving host computes the checksum on a frame and determines that the frame is damaged. The frame is then discarded. At which OSI layer did this happen?

Selecciona una de las siguientes respuestas posibles:

physical
session
data link
transport
network

Explicación

Pregunta 4 de 43

1

Which of the following correctly describe steps in the OSI data encapsulation process? (Choose two)

Selecciona una o más de las siguientes respuestas posibles:

The transport layer divides a data stream into segments and may add reliability and flow control information.
The data link layer adds physical source and destination addresses and an FCS to the segment.
Packets are created when the network layer encapsulates a frame with source and destination host addresses and protocol-related control information.
Packets are created when the network layer adds Layer 3 addresses and control information to a segment.
The presentation layer translates bits into voltages for transmission across the physical link.

Explicación

Pregunta 5 de 43

1

Host A is communicating with the server. What will be the source MAC address of the frames received by Host A from the server?

Selecciona una de las siguientes respuestas posibles:

The MAC address of the server network interface
The MAC address of host A
The MAC address of router interface e1
The MAC address of router interface e0

Explicación

Pregunta 6 de 43

1

Refer to the exhibit.

What two results would occur if the hub were to be replaced with a switch that is configured with one Ethernet VLAN? (Choose two.)

Selecciona una o más de las siguientes respuestas posibles:

The number of broadcast domains would remain the same.
The number of collision domains would increase.
The number of collision domains would decrease.
The number of broadcast domains would decrease.
The number of collision domains would remain the same.
he number of broadcast domains would increase.

Explicación

Pregunta 7 de 43

1

For what two purposes does the Ethernet protocol use physical addresses? (Choose two.)

Selecciona una o más de las siguientes respuestas posibles:

To uniquely identify devices at Layer 2
To allow communication with devices on a different network
To differentiate a Layer 2 frame from a Layer 3 packet
To establish a priority system to determine which device gets to transmit first
To allow communication between different devices on the same network
To allow detection of a remote device when its physical address is unknown

Explicación

Pregunta 8 de 43

1

In an Ethernet network, under what two scenarios can devices transmit? (Choose two.)

Selecciona una o más de las siguientes respuestas posibles:

When they receive a special token
when there is a carrier
When they detect no other devices are sending
When the medium is idle
When the server grants access

Explicación

Pregunta 9 de 43

1

Which of the following statements describe the network shown in the graphic?

What are the proper statements?. (Choose two)

Selecciona una o más de las siguientes respuestas posibles:

There are two broadcast domains in the network.
There are four broadcast domains in the network.
There are six broadcast domains in the network.
There are four collision domains in the network. in the network.
There are five collision domains in the network.
There are seven collision domains

Explicación

Pregunta 10 de 43

1

How many broadcast domains are shown in the graphic assuming only the default VLAN is configured on the switches?

Selecciona una de las siguientes respuestas posibles:

one
six
twelve
two

Explicación

Pregunta 11 de 43

1

What is the first 24 bits in a MAC address called?

Selecciona una de las siguientes respuestas posibles:

NIC
BIA
OUI
VAI

Explicación

Pregunta 12 de 43

1

A network administrator is verifying the configuration of a newly installed host by establishing an FTP connection to a remote server.

What is the highest layer of the protocol stack that the network administrator is using for this operation?

Selecciona una de las siguientes respuestas posibles:

Application
Presentation
Session
Transport
Internet
data link

Explicación

Pregunta 13 de 43

1

Where does routing occur within the DoD TCP/IP reference model?

Selecciona una de las siguientes respuestas posibles:

Application
Internet
Network
Transport

Explicación

Pregunta 14 de 43

1

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 15 de 43

1

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

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. A host will usually keep the same address by periodically contacting the DHCP server to renew the lease.

Explicación

Pregunta 16 de 43

1

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 17 de 43

1

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 conficts.
A DHCP server uses a gratuitous ARP to detect DHCP clients.
A DHCP client uses a gratuitous ARP to detect a DHCP server.
f 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 18 de 43

1

Refer to the exhibit.
Host A pings interface S0/0 on router 3. What is the TTL value for that ping?

Selecciona una de las siguientes respuestas posibles:

252
253
254
255

Explicación

Pregunta 19 de 43

1

Which command can be used from a PC to verify the connectivity between hosts that connect through a switch in the same LAN?

Selecciona una de las siguientes respuestas posibles:

Ping address
Tracert address
Traceroute address
Arp address

Explicación

Pregunta 20 de 43

1

An administrator must assign static IP addresses to the servers in a network. For network 192.168.20.24/29, the router is assigned the first usable host address while the sales server is given the last usable host address. Which of the following should be entered into the IP properties box for the sales server?

Selecciona una de las siguientes respuestas posibles:

- IP address: 192.168.20.14
- Subnet Mask: 255.255.255.248
- Default Gateway: 192.168.20.9
- IP address: 192.168.20.254
- Subnet Mask: 255.255.255.0
- Default Gateway: 192.168.20.1
- P address: 192.168.20.30
- Subnet Mask: 255.255.255.248
- Default Gateway: 192.168.20.25
- IP address: 192.168.20.30
- Subnet Mask: 255.255.255.240
- Default Gateway: 192.168.20.17
- IP address: 192.168.20.30
- Subnet Mask: 255.255.255.240
- Default Gateway: 192.168.20.25

Explicación

Pregunta 21 de 43

1

Which subnet mask would be appropriate for a network address range to be subnetted for up to eight LANs, with each LAN containing 5 to 26 hosts?

Selecciona una de las siguientes respuestas posibles:

0.0.0.240
255.255.255.252
255.255.255.0
255.255.255.224
255.255.255.240

Explicación

Pregunta 22 de 43

1

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
P 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 23 de 43

1

A national retail chain needs to design an IP addressing scheme to support a nationwide network. The company needs a minimum of 300 sub-networks and a maximum of 50 host addresses per subnet. Working with only one Class B address, which of the following subnet masks will support an appropriate addressing scheme? (Choose two.)

Selecciona una o más de las siguientes respuestas posibles:

255.255.255.0
255.255.255.128
255.255.252.0
255.255.255.224
255.255.255.192
255.255.248.0

Explicación

Pregunta 24 de 43

1

What will happen if a private IP address is assigned to a public interface connected to an ISP?

Selecciona una de las siguientes respuestas posibles:

Addresses in a private range will be not routed on the Internet backbone.
Only the ISP router will have the capability to access the public network.
The NAT process will be used to translate this address in a valid IP address.
Several automated methods will be necessary on the private network.
A conflict of IP addresses happens, because other public routers can use the same range.

Explicación

Pregunta 25 de 43

1

Refer to the exhibit.
An administrator pings the default gateway at 10.10.10.1 and sees the output as shown. At which OSI layer is the problem?

Selecciona una de las siguientes respuestas posibles:

Data link layer
Application layer
Access layer
Session layer
Network layer

Explicación

Pregunta 26 de 43

1

Refer to the exhibit. A new subnet with 60 hosts has been added to the network. Which subnet address should this network use to provide enough usable addresses while wasting the fewest addresses?

Selecciona una de las siguientes respuestas posibles:

92.168.1.56/27
192.168.1.64/26
192.168.1.64/27
192.168.1.56/26

Explicación

Pregunta 27 de 43

1

Refer to the exhibit.
All of the routers in the network are configured with the ip subnet-zero command. Which network addresses should be used for Link A and Network A? (Choose two.)

Selecciona una o más de las siguientes respuestas posibles:

Network A – 172.16.3.48/26
Network A – 172.16.3.128/25
Network A – 172.16.3.192/26
Link A – 172.16.3.0/30
Link A – 172.16.3.40/30
Link A – 172.16.3.112/30

Explicación

Pregunta 28 de 43

1

Refer to the exhibit. Which subnet mask will place all hosts on Network B in the same subnet with the least amount of wasted addresses?

Selecciona una de las siguientes respuestas posibles:

255.255.255.0
255.255.254.0
255.255.252.0
255.255.248.0

Explicación

Pregunta 29 de 43

1

Refer to the exhibit. What is the most appropriate summarization for these routes?

Selecciona una de las siguientes respuestas posibles:

10.0.0.0 /21
10.0.0.0 /22
10.0.0.0 /23
10.0.0.0 /24

Explicación

Pregunta 30 de 43

1

Given an IP address 172.16.28.252 with a subnet mask of 255.255.240.0, what is the correct network address?

Selecciona una de las siguientes respuestas posibles:

172.16.16.0
172.16.24.0
172.16.0.0
172.16.28.0

Explicación

Pregunta 31 de 43

1

You are working in a data center environment and are assigned the address range 10.188.31.0/23. You are asked to develop an IP addressing plan to allow the maximum number of subnets with as many as 30 hosts each. Which IP address range meets these requirements?

Selecciona una de las siguientes respuestas posibles:

10.188.31.0/27
10.188.31.0/26
10.188.31.0/29
10.188.31.0/28
10.188.31.0/25

Explicación

Pregunta 32 de 43

1

The network administrator needs to address seven LANs. RIP version 1 is the only routing protocol in use on the network and subnet 0 is not being used. What is the maximum number of usable IP addresses that can be supported on each LAN if the organization is using one class C address block?

Selecciona una de las siguientes respuestas posibles:

8
6
30
32
14
16

Explicación

Pregunta 33 de 43

1

Refer to the exhibit. The networks connected to router R2 have been summarized as a 192.168.176.0/21 route and sent to R1. Which two packet destination addresses will R1 forward to R2? (Choose two.)

Selecciona una o más de las siguientes respuestas posibles:

192.168.194.160
192.168.183.41
192.168.159.2
192.168.183.255
192.168.179.4
192.168.184.45

Explicación

Pregunta 34 de 43

1

Refer to the exhibit. What will Router1 do when it receives the data frame shown? (Choose three.)

Selecciona una o más de las siguientes respuestas posibles:

Router1 will strip off the source MAC address and replace it with the MAC address 0000.0c36.6965.
Router1 will strip off the source IP address and replace it with the IP address 192.168.40.1.
Router1 will strip off the destination MAC address and replace it with the MAC address 0000.0c07.4320.
Router1 will strip off the destination IP address and replace it with the IP address of 192.168.40.1.
Router1 will forward the data packet out interface FastEthernet0/1.
Router1 will forward the data packet out interface FastEthernet0/2.

Explicación

Pregunta 35 de 43

1

Refer to the exhibit. 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 36 de 43

1

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 37 de 43

1

Refer to the exhibit.
A network administrator configures a new router and enters the copy startup-config runningconfig 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 38 de 43

1

Refer to the exhibit. 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 39 de 43

1

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

Selecciona una de las siguientes respuestas posibles:

Show access-lists
Show interface
Show ip interface
Show ip access-lists
List ip interface

Explicación

Pregunta 40 de 43

1

Which router IOS commands can be used to troubleshoot LAN connectivity problems? (Choose three.)

Selecciona una o más de las siguientes respuestas posibles:

winipcfg
tracert
ping
ip config
Show ip route
show interfaces

Explicación

Pregunta 41 de 43

1

Refer to the exhibit.
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 42 de 43

1

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 43 de 43

1

Which command can you use to manually assign a static IPv6 address to a router interface?

Selecciona una de las siguientes respuestas posibles:

ipv6 address PREFIX_1::1/64
ipv6 autoconfig 2001:db8:2222:7272::72/64
ipv6 autoconfig
ipv6 address 2001:db8:2222:7272::72/64

	Creado por Diego Arturo Aba hace alrededor de 8 años

Test sobre Examen CCNA Certificacion Test, creado por Diego Arturo Aba el 18/04/2016.

Examen CCNA Certificacion Test

Pregunta 1 de 43

Which layer in the OSI reference model is responsible for determining the availability of the receiving program and checking to see if enough resources exist for that communication?

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 2 de 43

A network interface port has collision detection and carrier sensing enabled on a shared twisted pair network. From this statement, what is known about the network interface port?

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 3 de 43

A receiving host computes the checksum on a frame and determines that the frame is damaged. The frame is then discarded. At which OSI layer did this happen?

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 4 de 43

Which of the following correctly describe steps in the OSI data encapsulation process? (Choose two)

Selecciona una o más de las siguientes respuestas posibles:

Explicación

Pregunta 5 de 43

Host A is communicating with the server. What will be the source MAC address of the frames received by Host A from the server?

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 6 de 43

Refer to the exhibit. What two results would occur if the hub were to be replaced with a switch that is configured with one Ethernet VLAN? (Choose two.)

Selecciona una o más de las siguientes respuestas posibles:

Explicación

Pregunta 7 de 43

For what two purposes does the Ethernet protocol use physical addresses? (Choose two.)

Selecciona una o más de las siguientes respuestas posibles:

Explicación

Pregunta 8 de 43

In an Ethernet network, under what two scenarios can devices transmit? (Choose two.)

Selecciona una o más de las siguientes respuestas posibles:

Explicación

Pregunta 9 de 43

Which of the following statements describe the network shown in the graphic? What are the proper statements?. (Choose two)

Selecciona una o más de las siguientes respuestas posibles:

Explicación

Pregunta 10 de 43

How many broadcast domains are shown in the graphic assuming only the default VLAN is configured on the switches?

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 11 de 43

What is the first 24 bits in a MAC address called?

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 12 de 43

A network administrator is verifying the configuration of a newly installed host by establishing an FTP connection to a remote server. What is the highest layer of the protocol stack that the network administrator is using for this operation?

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 13 de 43

Where does routing occur within the DoD TCP/IP reference model?

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 14 de 43

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

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 15 de 43

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

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 16 de 43

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

Selecciona una o más de las siguientes respuestas posibles:

Explicación

Pregunta 17 de 43

Which statement is correct regarding the operation of DHCP?

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 18 de 43

Refer to the exhibit. Host A pings interface S0/0 on router 3. What is the TTL value for that ping?

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 19 de 43

Which command can be used from a PC to verify the connectivity between hosts that connect through a switch in the same LAN?

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 20 de 43

Selecciona una de las siguientes respuestas posibles:

Refer to the exhibit.

What two results would occur if the hub were to be replaced with a switch that is configured with one Ethernet VLAN? (Choose two.)

Which of the following statements describe the network shown in the graphic?

What are the proper statements?. (Choose two)

A network administrator is verifying the configuration of a newly installed host by establishing an FTP connection to a remote server.

What is the highest layer of the protocol stack that the network administrator is using for this operation?

Refer to the exhibit.
Host A pings interface S0/0 on router 3. What is the TTL value for that ping?

Refer to the exhibit.
An administrator pings the default gateway at 10.10.10.1 and sees the output as shown. At which OSI layer is the problem?

Refer to the exhibit.
All of the routers in the network are configured with the ip subnet-zero command. Which network addresses should be used for Link A and Network A? (Choose two.)