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CISCO 2 - Chapter 5 bis Chapter 9

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CISCO vom Sommersemester 2020 CSDC
Leona W.
Quiz by Leona W., updated more than 1 year ago
Leona W.
Created by Leona W. about 4 years ago
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Resource summary

Question 1

Question
Which statement describes the port speed LED on the Cisco Catalyst 2960 switch?
Answer
  • If the LED is amber, the port is operating at 1000 Mb/s.
  • If the LED is blinking green, the port is operating at 10 Mb/s.
  • If the LED is off, the port is not operating.
  • If the LED is green, the port is operating at 100 Mb/s.

Question 2

Question
Which command is used to set the BOOT environment variable that defines where to find the IOS image file on a switch?
Answer
  • confreg
  • boot loader
  • boot system
  • config-register

Question 3

Question
What is a function of the switch boot loader?
Answer
  • to provide an environment to operate in when the switch operating system cannot be found
  • to control how much RAM is available to the switch during the boot process
  • to provide security for the vulnerable state when the switch is booting
  • to speed up the boot process

Question 4

Question
Which interface is the default location that would contain the IP address used to manage a 24-port Ethernet switch?
Answer
  • VLAN 99
  • interface connected to the default gateway
  • Fa0/1
  • Fa0/0
  • VLAN 1

Question 5

Question
A production switch is reloaded and finishes with a Switch> prompt. What two facts can be determined? (Choose two.)
Answer
  • The switch did not locate the Cisco IOS in flash, so it defaulted to ROM.
  • A full version of the Cisco IOS was located and loaded.
  • There is not enough RAM or flash on this router.
  • The boot process was interrupted.
  • POST occurred normally.

Question 6

Question
Which two statements are true about using full-duplex Fast Ethernet? (Choose two.)
Answer
  • Full-duplex Fast Ethernet offers 100 percent efficiency in both directions.
  • Performance is improved because the NIC is able to detect collisions.
  • Nodes operate in full-duplex with unidirectional data flow.
  • Latency is reduced because the NIC processes frames faster.
  • Performance is improved with bidirectional data flow.

Question 7

Question
In which situation would a technician use the show interfaces switch command?
Answer
  • to determine the MAC address of a directly attached network device on a particular interface
  • when an end device can reach local devices, but not remote devices
  • when packets are being dropped from a particular directly attached host
  • to determine if remote access is enabled

Question 8

Question
Refer to the exhibit. A network technician is troubleshooting connectivity issues in an Ethernet network with the command show interfaces fastEthernet 0/0. What conclusion can be drawn based on the partial output in the exhibit?
Image:
Image (binary/octet-stream)
Answer
  • All hosts on this network communicate in full-duplex mode.
  • A malfunctioning NIC can cause frames to be transmitted that are longer than the allowed maximum length.
  • There are collisions in the network that cause frames to occur that are less than 64 bytes in length.
  • Some workstations might use an incorrect cabling type to connect to the network.

Question 9

Question
Refer to the exhibit. What media issue might exist on the link connected to Fa0/1 based on the show interface command?
Image:
Image (binary/octet-stream)
Answer
  • The bandwidth parameter on the interface might be too high.
  • The interface might be configured as half-duplex.
  • The cable attaching the host to port Fa0/1 might be too long.
  • There could be too much electrical interference and noise on the link.
  • There could be an issue with a faulty NIC.

Question 10

Question
If one end of an Ethernet connection is configured for full duplex and the other end of the connection is configured for half duplex, where would late collisions be observed?
Answer
  • on the half-duplex end of the connection
  • only on serial interfaces
  • on the full-duplex end of the connection
  • on both ends of the connection

Question 11

Question
What is one difference between using Telnet or SSH to connect to a network device for management purposes?
Answer
  • Telnet sends a username and password in plain text, whereas SSH encrypts the username and password.
  • Telnet supports a host GUI whereas SSH only supports a host CLI.
  • Telnet does not provide authentication whereas SSH provides authentication.
  • Telnet uses UDP as the transport protocol whereas SSH uses TCP.

Question 12

Question
Refer to the exhibit. The network administrator wants to configure Switch1 to allow SSH connections and prohibit Telnet connections. How should the network administrator change the displayed configuration to satisfy the requirement?
Image:
Image (binary/octet-stream)
Answer
  • Use SSH version 1.
  • Modify the transport input command.
  • Configure SSH on a different line.
  • Reconfigure the RSA key.

Question 13

Question
What is the effect of using the switchport port-security command?
Answer
  • detects the first MAC address in a frame that comes into a port and places that MAC address in the MAC address table
  • automatically shuts an interface down if applied to a trunk port
  • enables port security globally on the switch
  • enables port security on an interface

Question 14

Question
Where are dynamically learned MAC addresses stored when sticky learning is enabled with the switchport port-security mac-address sticky command?
Answer
  • flash
  • NVRAM
  • RAM
  • ROM

Question 15

Question
A network administrator configures the port security feature on a switch. The security policy specifies that each access port should allow up to two MAC addresses. When the maximum number of MAC addresses is reached, a frame with the unknown source MAC address is dropped and a notification is sent to the syslog server. Which security violation mode should be configured for each access port?
Answer
  • shutdown
  • warning
  • protect
  • restrict

Question 16

Question
Which two statements are true regarding switch port security? (Choose two.)
Answer
  • If fewer than the maximum number of MAC addresses for a port are configured statically, dynamically learned addresses are added to CAM until the maximum number is reached.
  • After entering the sticky parameter, only MAC addresses subsequently learned are converted to secure MAC addresses.
  • The three configurable violation modes all require user intervention to re-enable ports.
  • Dynamically learned secure MAC addresses are lost when the switch reboots.
  • The three configurable violation modes all log violations via SNMP.

Question 17

Question
Which action will bring an error-disabled switch port back to an operational state?
Answer
  • Issue the shutdown and then no shutdown interface commands.
  • Clear the MAC address table on the switch.
  • Issue the switchport mode access command on the interface.
  • Remove and reconfigure port security on the interface.

Question 18

Question
Refer to the exhibit. Port Fa0/2 has already been configured appropriately. The IP phone and PC work properly. Which switch configuration would be most appropriate for port Fa0/2 if the network administrator has the following goals? No one is allowed to disconnect the IP phone or the PC and connect some other wired device. If a different device is connected, port Fa0/2 is shut down. The switch should automatically detect the MAC address of the IP phone and the PC and add those addresses to the running configuration.
Image:
Image (binary/octet-stream)
Answer
  • SWA(config-if)# switchport port-security SWA(config-if)# switchport port-security mac-address sticky
  • SWA(config-if)# switchport port-security mac-address sticky SWA(config-if)# switchport port-security maximum 2
  • SWA(config-if)# switchport port-security SWA(config-if)# switchport port-security maximum 2 SWA(config-if)# switchport port-security mac-address sticky
  • SWA(config-if)# switchport port-security SWA(config-if)# switchport port-security maximum 2 SWA(config-if)# switchport port-security mac-address sticky SWA(config-if)# switchport port-security violation restrict

Question 19

Question
Refer to the exhibit. What can be determined about port security from the information that is shown?
Image:
Image (binary/octet-stream)
Answer
  • The port has been shut down.
  • The port has the maximum number of MAC addresses that is supported by a Layer 2 switch port which is configured for port security.
  • The port violation mode is the default for any port that has port security enabled.
  • The port has two attached devices.

Question 20

Question
Refer to the exhibit. Which event will take place if there is a port security violation on switch S1 interface Fa0/1?
Image:
Image (binary/octet-stream)
Answer
  • A notification is sent.
  • The interface will go into error-disabled state.
  • Packets with unknown source addresses will be dropped.
  • A syslog message is logged.

Question 21

Question
What are three primary benefits of using VLANs? (Choose three.)
Answer
  • no required configuration
  • improved IT staff efficiency
  • end user satisfaction
  • cost reduction
  • a reduction in the number of trunk links
  • security

Question 22

Question
Which type of VLAN is used to designate which traffic is untagged when crossing a trunk port?
Answer
  • management
  • native
  • default
  • data

Question 23

Question
A network administrator is determining the best placement of VLAN trunk links. Which two types of point-to-point connections utilize VLAN trunking?​ (Choose two.)
Answer
  • between two switches that share a common VLAN
  • between a switch and a network printer
  • between a switch and a server that has an 802.1Q NIC
  • between a switch and a client PC
  • between two switches that utilize multiple VLANs

Question 24

Question
What must the network administrator do to remove Fast Ethernet port fa0/1 from VLAN 2 and assign it to VLAN 3?
Answer
  • Enter the no shutdown command in interface configuration mode to return it to the default configuration and then configure the port for VLAN 3.
  • Enter the switchport trunk native vlan 3 command in interface configuration mode.
  • Enter the switchport access vlan 3 command in interface configuration mode.
  • Enter the no vlan 2 and the vlan 3 commands in global configuration mode.

Question 25

Question
When a Cisco switch receives untagged frames on a 802.1Q trunk port, which VLAN ID is the traffic switched to by default?
Answer
  • management VLAN ID
  • data VLAN ID
  • native VLAN ID
  • unused VLAN ID

Question 26

Question
Port Fa0/11 on a switch is assigned to VLAN 30. If the command no switchport access vlan 30 is entered on the Fa0/11 interface, what will happen?
Answer
  • VLAN 30 will be deleted.
  • Port Fa0/11 will be returned to VLAN 1.
  • An error message would be displayed.
  • Port Fa0/11 will be shutdown.

Question 27

Question
Which command is used to remove only VLAN 20 from a switch?
Answer
  • no switchport access vlan 20
  • no vlan 20
  • delete flash:vlan.dat
  • delete vlan.dat

Question 28

Question
What happens to a port that is associated with VLAN 10 when the administrator deletes VLAN 10 from the switch?
Answer
  • The port creates the VLAN again.
  • The port automatically associates itself with the native VLAN.
  • The port goes back to the default VLAN.
  • The port becomes inactive.

Question 29

Question
Which two characteristics match extended range VLANs? (Choose two.)
Answer
  • They are commonly used in small networks.
  • VLANs are initialized from flash memory.
  • They are saved in the running-config file by default.
  • VLAN IDs exist between 1006 to 4094.
  • CDP can be used to learn and store these VLANs.

Question 30

Question
A Cisco switch currently allows traffic tagged with VLANs 10 and 20 across trunk port Fa0/5. What is the effect of issuing a switchport trunk allowed vlan 30 command on Fa0/5?
Answer
  • It allows a native VLAN of 30 to be implemented on Fa0/5.
  • It allows only VLAN 30 on Fa0/5.
  • It allows VLANs 10, 20, and 30 on Fa0/5.
  • It allows VLANs 1 to 30 on Fa0/5.

Question 31

Question
Refer to the exhibit. PC-A and PC-B are both in VLAN 60. PC-A is unable to communicate with PC-B. What is the problem?
Image:
Image (binary/octet-stream)
Answer
  • The native VLAN should be VLAN 60.
  • The VLAN that is used by PC-A is not in the list of allowed VLANs on the trunk.
  • The trunk has been configured with the switchport nonegotiate command.
  • The native VLAN is being pruned from the link.

Question 32

Question
Refer to the exhibit. DLS1 is connected to another switch, DLS2, via a trunk link. A host that is connected to DLS1 is not able to communicate to a host that is connected to DLS2, even though they are both in VLAN 99. Which command should be added to Fa0/1 on DLS1 to correct the problem?
Image:
Image (binary/octet-stream)
Answer
  • switchport nonegotiate
  • switchport trunk allowed vlan add 99
  • switchport trunk native vlan 66
  • switchport mode dynamic auto

Question 33

Question
What is a characteristic of legacy inter-VLAN routing?
Answer
  • Inter-VLAN routing must be performed on a switch instead of a router.
  • The user VLAN must be the same ID number as the management VLAN.
  • The router requires one Ethernet link for each VLAN.
  • Only one VLAN can be used in the topology.

Question 34

Question
What is a disadvantage of using router-on-a-stick inter-VLAN routing?
Answer
  • requires the use of multiple router interfaces configured to operate as access links
  • does not scale well beyond 50 VLANs
  • requires the use of more physical interfaces than legacy inter-VLAN routing
  • does not support VLAN-tagged packets

Question 35

Question
Refer to the exhibit. Router RA receives a packet with a source address of 192.168.1.35 and a destination address of 192.168.1.85. What will the router do with this packet?
Image:
Image (binary/octet-stream)
Answer
  • The router will drop the packet.
  • The router will forward the packet out interface FastEthernet 0/1.2 and interface FastEthernet 0/1.3.
  • The router will forward the packet out interface FastEthernet 0/1.3.
  • The router will forward the packet out interface FastEthernet 0/1.2.
  • The router will forward the packet out interface FastEthernet 0/1.1.

Question 36

Question
Refer to the exhibit. In what switch mode should port G0/1 be assigned if Cisco best practices are being used?
Image:
Image (binary/octet-stream)
Answer
  • access
  • auto
  • native
  • trunk

Question 37

Question
A small college uses VLAN 10 for the classroom network and VLAN 20 for the office network. What is needed to enable communication between these two VLANs while using legacy inter-VLAN routing?
Answer
  • A switch with a port that is configured as trunk is needed to connect to a router.
  • A router with one VLAN interface is needed to connect to the SVI on a switch.
  • Two groups of switches are needed, each with ports that are configured for one VLAN.
  • A router with at least two LAN interfaces should be used.

Question 38

Question
Refer to the exhibit. A network administrator needs to configure router-on-a-stick for the networks that are shown. How many subinterfaces will have to be created on the router if each VLAN that is shown is to be routed and each VLAN has its own subinterface?
Image:
Image (binary/octet-stream)
Answer
  • 1
  • 2
  • 3
  • 4
  • 5

Question 39

Question
When configuring a router as part of a router-on-a-stick inter-VLAN routing topology, where should the IP address be assigned?
Answer
  • to the VLAN
  • to the SVI
  • to the subinterface
  • to the interface

Question 40

Question
A high school uses VLAN15 for the laboratory network and VLAN30 for the faculty network. What is required to enable communication between these two VLANs while using the router-on-a-stick approach?
Answer
  • A switch with a port that is configured as a trunk is needed when connecting to the router.
  • Two groups of switches are needed, each with ports that are configured for one VLAN.
  • A router with at least two LAN interfaces is needed.
  • A multilayer switch is needed.

Question 41

Question
Refer to the exhibit. A router-on-a-stick configuration was implemented for VLANs 15, 30, and 45, according to the show running-config command output. PCs on VLAN 45 that are using the 172.16.45.0 /24 network are having trouble connecting to PCs on VLAN 30 in the 172.16.30.0 /24 network. Which error is most likely causing this problem?​
Image:
Image (binary/octet-stream)
Answer
  • The wrong VLAN has been configured on GigabitEthernet 0/0.45.
  • There is an incorrect IP address configured on GigabitEthernet 0/0.30.
  • The GigabitEthernet 0/0 interface is missing an IP address.
  • The command no shutdown is missing on GigabitEthernet 0/0.30.

Question 42

Question
A network administrator issues the show VLAN brief command while troubleshooting a user support ticket. What output will be displayed?
Answer
  • the VLAN assignment and native VLAN
  • the VLAN assignment and membership for all switch ports
  • the VLAN assignment and trunking encapsulation
  • the VLAN assignment and membership for device MAC addresses

Question 43

Question
Which four steps are needed to configure a voice VLAN on a switch port? (Choose four).
Answer
  • Configure the interface as an IEEE 802.1Q trunk.
  • Configure the switch port interface with subinterfaces.
  • Ensure that voice traffic is trusted and tagged with a CoS priority value.
  • Activate spanning-tree PortFast on the interface.
  • Assign the voice VLAN to the switch port.
  • Add a voice VLAN.
  • Assign a data VLAN to the switch port.
  • Configure the switch port in access mode.

Question 44

Question
In which configuration would an outbound ACL placement be preferred over an inbound ACL placement?
Answer
  • when an interface is filtered by an outbound ACL and the network attached to the interface is the source network being filtered within the ACL
  • when an outbound ACL is closer to the source of the traffic flow
  • when a router has more than one ACL
  • when the ACL is applied to an outbound interface to filter packets coming from multiple inbound interfaces before the packets exit the interface

Question 45

Question
Which address is required in the command syntax of a standard ACL?
Answer
  • destination IP address
  • source IP address
  • destination MAC address
  • source MAC address

Question 46

Question
Which statement describes a difference between the operation of inbound and outbound ACLs?
Answer
  • On a network interface, more than one inbound ACL can be configured but only one outbound ACL can be configured.
  • Inbound ACLs are processed before the packets are routed while outbound ACLs are processed after the routing is completed.
  • Inbound ACLs can be used in both routers and switches but outbound ACLs can be used only on routers.
  • In contrast to outbound ALCs, inbound ACLs can be used to filter packets with multiple criteria.

Question 47

Question
Which three statements describe ACL processing of packets? (Choose three.)
Answer
  • Each packet is compared to the conditions of every ACE in the ACL before a forwarding decision is made.
  • Each statement is checked only until a match is detected or until the end of the ACE list.
  • A packet that does not match the conditions of any ACE will be forwarded by default.
  • A packet that has been denied by one ACE can be permitted by a subsequent ACE.
  • A packet can either be rejected or forwarded as directed by the ACE that is matched.
  • An implicit deny any rejects any packet that does not match any ACE.

Question 48

Question
What single access list statement matches all of the following networks? 192.168.16.0 192.168.17.0 192.168.18.0 192.168.19.0
Answer
  • access-list 10 permit 192.168.16.0 0.0.3.25
  • access-list 10 permit 192.168.0.0 0.0.15.255
  • access-list 10 permit 192.168.16.0 0.0.15.255
  • access-list 10 permit 192.168.16.0 0.0.0.255

Question 49

Question
A network administrator needs to configure a standard ACL so that only the workstation of the administrator with the IP address 192.168.15.23 can access the virtual terminal of the main router. Which two configuration commands can achieve the task? (Choose two.)
Answer
  • Router1(config)# access-list 10 permit 192.168.15.23 255.255.255.255
  • Router1(config)# access-list 10 permit 192.168.15.23 255.255.255.0
  • Router1(config)# access-list 10 permit 192.168.15.23 0.0.0.255
  • Router1(config)# access-list 10 permit 192.168.15.23 0.0.0.0
  • Router1(config)# access-list 10 permit host 192.168.15.23

Question 50

Question
If a router has two interfaces and is routing both IPv4 and IPv6 traffic, how many ACLs could be created and applied to it?
Answer
  • 16
  • 12
  • 8
  • 6
  • 4

Question 51

Question
Which three statements are generally considered to be best practices in the placement of ACLs? (Choose three.)
Answer
  • For every inbound ACL placed on an interface, there should be a matching outbound ACL.
  • Place standard ACLs close to the destination IP address of the traffic.
  • Place extended ACLs close to the source IP address of the traffic.
  • Filter unwanted traffic before it travels onto a low-bandwidth link.
  • Place extended ACLs close to the destination IP address of the traffic.
  • Place standard ACLs close to the source IP address of the traffic.

Question 52

Question
Refer to the exhibit. Which command would be used in a standard ACL to allow only devices on the network attached to R2 G0/0 interface to access the networks attached to R1?
Image:
Image (binary/octet-stream)
Answer
  • access-list 1 permit 192.168.10.0 0.0.0.63
  • access-list 1 permit 192.168.10.128 0.0.0.63
  • access-list 1 permit 192.168.10.0 0.0.0.255
  • access-list 1 permit 192.168.10.96 0.0.0.31

Question 53

Question
If the network administrator created a standard ACL that allows only devices that connect to the R2 G0/0 network access to the devices on the R1 G0/1 interface, how should the ACL be applied?
Image:
Image (binary/octet-stream)
Answer
  • outbound on the R2 S0/0/1 interface
  • inbound on the R1 G0/1 interface
  • outbound on the R1 G0/1 interface
  • inbound on the R2 G0/0 interface

Question 54

Question
Refer to the following output. What is the significance of the 4 match(es) statement? R1# <output omitted> 10 permit 192.168.1.56 0.0.0.7 20 permit 192.168.1.64 0.0.0.63 (4 match(es)) 30 deny any (8 match(es))
Answer
  • Four packets have been denied that have been sourced from any IP address.
  • Four packets have been allowed through the router to reach the destination network of 192.168.1.64/26.
  • Four packets have been allowed through the router from PCs in the network of 192.168.1.64.
  • Four packets have been denied that are destined for the 192.168.1.64 network.

Question 55

Question
On which router should the show access-lists command be executed?
Answer
  • on the router that has the ACL configured
  • on any router through which the packet referenced in the ACL travels
  • on the router that routes the packet referenced in the ACL from the source network
  • on the router that routes the packet referenced in the ACL to the final destination network

Question 56

Question
What is the quickest way to remove a single ACE from a named ACL?
Answer
  • Create a new ACL with a different number and apply the new ACL to the router interface.
  • Copy the ACL into a text editor, remove the ACE, then copy the ACL back into the router.
  • Use the no access-list command to remove the entire ACL, then recreate it without the ACE.
  • Use the no keyword and the sequence number of the ACE to be removed.

Question 57

Question
Which feature will require the use of a named standard ACL rather than a numbered standard ACL?
Answer
  • the ability to add additional ACEs in the middle of the ACL without deleting and re-creating the list
  • the ability to specify source and destination addresses to use when identifying traffic
  • the ability to filter traffic based on an entire protocol suite and destination
  • the ability to filter traffic based on a specific protocol

Question 58

Question
An administrator has configured an access list on R1 to allow SSH administrative access from host 172.16.1.100. Which command correctly applies the ACL?
Answer
  • R1(config-line)# access-class 1 out
  • R1(config-line)# access-class 1 in
  • R1(config-if)# ip access-group 1 out
  • R1(config-if)# ip access-group 1 in

Question 59

Question
Which type of router connection can be secured by the access-class command?
Answer
  • Ethernet
  • serial
  • console
  • vty

Question 60

Question
Consider the following output for an ACL that has been applied to a router via the access-class in command. What can a network administrator determine from the output that is shown? R1# <output omitted> Standard IP access list 2 10 permit 192.168.10.0, wildcard bits 0.0.0.255 (2 matches) 20 deny any (1 match)
Answer
  • Two devices connected to the router have IP addresses of 192.168.10.x.
  • Traffic from two devices was allowed to enter one router port and be routed outbound to a different router port.
  • Two devices were able to use SSH or Telnet to gain access to the router.
  • Traffic from one device was not allowed to come into one router port and be routed outbound a different router port.

Question 61

Question
Refer to the exhibit. A router has an existing ACL that permits all traffic from the 172.16.0.0 network. The administrator attempts to add a new ACE to the ACL that denies packets from host 172.16.0.1 and receives the error message that is shown in the exhibit. What action can the administrator take to block packets from host 172.16.0.1 while still permitting all other traffic from the 172.16.0.0 network?
Image:
Image (binary/octet-stream)
Answer
  • Manually add the new deny ACE with a sequence number of 5.
  • Add a deny any any ACE to access-list 1.
  • Create a second access list denying the host and apply it to the same interface.
  • Manually add the new deny ACE with a sequence number of 15.

Question 62

Question
Refer to the exhibit. An ACL was configured on R1 with the intention of denying traffic from subnet 172.16.4.0/24 into subnet 172.16.3.0/24. All other traffic into subnet 172.16.3.0/24 should be permitted. This standard ACL was then applied outbound on interface Fa0/0. Which conclusion can be drawn from this configuration?​
Image:
Image (binary/octet-stream)
Answer
  • Only traffic from the 172.16.4.0/24 subnet is blocked, and all other traffic is allowed.​
  • The ACL should be applied outbound on all interfaces of R1.
  • All traffic will be blocked, not just traffic from the 172.16.4.0/24 subnet.
  • An extended ACL must be used in this situation.
  • The ACL should be applied to the FastEthernet 0/0 interface of R1 inbound to accomplish the requirements.

Question 63

Question
Refer to the exhibit. What will happen to the access list 10 ACEs if the router is rebooted before any other commands are implemented?
Image:
Image (binary/octet-stream)
Answer
  • The ACEs of access list 10 will be deleted.
  • The ACEs of access list 10 wildcard masks will be converted to subnet masks.
  • The ACEs of access list 10 will be renumbered.
  • The ACEs of access list 10 will not be affected.

Question 64

Question
What is the effect of configuring an ACL with only ACEs that deny traffic?
Answer
  • The ACL must be applied outbound only.
  • The ACL must be applied inbound only.
  • The ACL will permit any traffic that is not specifically denied.
  • The ACL will block all traffic.

Question 65

Question
Which type of ACL statements are commonly reordered by the Cisco IOS as the first ACEs?
Answer
  • lowest sequence number
  • permit any
  • range
  • host

Question 66

Question
A network administrator is configuring an ACL to restrict access to certain servers in the data center. The intent is to apply the ACL to the interface connected to the data center LAN. What happens if the ACL is incorrectly applied to an interface in the inbound direction instead of the outbound direction?
Answer
  • The ACL will analyze traffic after it is routed to the outbound interface.
  • The ACL does not perform as designed.
  • All traffic is permitted.
  • All traffic is denied.

Question 67

Question
When would a network administrator use the clear access-list counters command?
Answer
  • when troubleshooting an ACL and needing to know how many packets matched
  • when an ACE is deleted from an ACL
  • when buffer memory is low
  • when obtaining a baseline

Question 68

Question
What is the result of a network technician issuing the command ip dhcp excluded-address 10.0.15.1 10.0.15.15 on a Cisco router?
Answer
  • The ip dhcp excluded-address command is followed by the first and the last addresses to be excluded from being leased to DHCP clients.
  • The Cisco router will exclude 15 IP addresses from being leased to DHCP clients.
  • The Cisco router will allow only the specified IP addresses to be leased to clients.
  • The Cisco router will automatically create a DHCP pool using a /28 mask.
  • The Cisco router will exclude only the 10.0.15.1 and 10.0.15.15 IP addresses from being leased to DHCP clients.

Question 69

Question
Which DHCPv4 message will a client send to accept an IPv4 address that is offered by a DHCP server?
Answer
  • broadcast DHCPREQUEST
  • unicast DHCPREQUEST
  • broadcast DHCPACK
  • unicast DHCPACK

Question 70

Question
A company uses DHCP servers to dynamically assign IPv4 addresses to employee workstations. The address lease duration is set as 5 days. An employee returns to the office after an absence of one week. When the employee boots the workstation, it sends a message to obtain an IP address. Which Layer 2 and Layer 3 destination addresses will the message contain?
Answer
  • FF-FF-FF-FF-FF-FF and IPv4 address of the DHCP server
  • MAC address of the DHCP server and 255.255.255.255
  • both MAC and IPv4 addresses of the DHCP server
  • FF-FF-FF-FF-FF-FF and 255.255.255.255

Question 71

Question
Which is a DHCPv4 address allocation method that assigns IPv4 addresses for a limited lease period?
Answer
  • dynamic allocation
  • automatic allocation
  • pre-allocation
  • manual allocation

Question 72

Question
Which address does a DHCPv4 server target when sending a DHCPOFFER message to a client that makes an address request?
Answer
  • broadcast MAC address
  • gateway IP address
  • client hardware address
  • client IP address

Question 73

Question
As a DHCPv4 client lease is about to expire, what is the message that the client sends the DHCP server?
Answer
  • DHCPACK
  • DHCPREQUEST
  • DHCPOFFER
  • DHCPDISCOVER

Question 74

Question
What is an advantage of configuring a Cisco router as a relay agent?
Answer
  • It reduces the response time from a DHCP server.
  • It can provide relay services for multiple UDP services.
  • It can forward both broadcast and multicast messages on behalf of clients.
  • It will allow DHCPDISCOVER messages to pass without alteration.

Question 75

Question
An administrator issues the commands: Router(config)# interface g0/1 Router(config-if)# ip address dhcp What is the administrator trying to achieve?
Answer
  • configuring the router to resolve IP address conflicts
  • configuring the router to act as a relay agent
  • configuring the router to obtain IP parameters from a DHCPv4 server
  • configuring the router to act as a DHCPv4 server

Question 76

Question
Under which two circumstances would a router usually be configured as a DHCPv4 client? (Choose two.)
Answer
  • The router has a fixed IP address.
  • This is an ISP requirement.
  • The router is meant to provide IP addresses to the hosts.
  • The administrator needs the router to act as a relay agent.
  • The router is intended to be used as a SOHO gateway.

Question 77

Question
A company uses the SLAAC method to configure IPv6 addresses for the employee workstations. Which address will a client use as its default gateway?​
Answer
  • the global unicast address of the router interface that is attached to the network
  • the unique local address of the router interface that is attached to the network
  • the all-routers multicast address
  • the link-local address of the router interface that is attached to the network

Question 78

Question
A network administrator configures a router to send RA messages with M flag as 0 and O flag as 1. Which statement describes the effect of this configuration when a PC tries to configure its IPv6 address?
Answer
  • It should contact a DHCPv6 server for the prefix, the prefix-length information, and an interface ID that is both random and unique.
  • It should use the information that is contained in the RA message and contact a DHCPv6 server for additional information.
  • It should contact a DHCPv6 server for all the information that it needs.
  • It should use the information that is contained in the RA message exclusively.

Question 79

Question
A company implements the stateless DHCPv6 method for configuring IPv6 addresses on employee workstations. After a workstation receives messages from multiple DHCPv6 servers to indicate their availability for DHCPv6 service, which message does it send to a server for configuration information?
Answer
  • DHCPv6 INFORMATION-REQUEST
  • DHCPv6 ADVERTISE
  • DHCPv6 REQUEST
  • DHCPv6 SOLICIT

Question 80

Question
An administrator wants to configure hosts to automatically assign IPv6 addresses to themselves by the use of Router Advertisement messages, but also to obtain the DNS server address from a DHCPv6 server. Which address assignment method should be configured?
Answer
  • RA and EUI-64
  • stateful DHCPv6
  • stateless DHCPv6
  • SLAAC

Question 81

Question
How does an IPv6 client ensure that it has a unique address after it configures its IPv6 address using the SLAAC allocation method?
Answer
  • It sends an ICMPv6 Neighbor Solicitation message with the IPv6 address as the target IPv6 address.
  • It contacts the DHCPv6 server via a special formed ICMPv6 message.
  • It sends an ARP message with the IPv6 address as the destination IPv6 address.
  • It checks with the IPv6 address database that is hosted by the SLAAC server.

Question 82

Question
What is used in the EUI-64 process to create an IPv6 interface ID on an IPv6 enabled interface?
Answer
  • an IPv4 address that is configured on the interface
  • an IPv6 address that is provided by a DHCPv6 server
  • a randomly generated 64-bit hexadecimal address
  • the MAC address of the IPv6 enabled interface

Question 83

Question
What two methods can be used to generate an interface ID by an IPv6 host that is using SLAAC? (Choose two.)
Answer
  • ARP
  • DAD
  • stateful DHCPv6
  • random generation
  • EUI-64

Question 84

Question
Refer to the exhibit. Based on the output that is shown, what kind of IPv6 addressing is being configured?
Image:
Image (binary/octet-stream)
Answer
  • stateless DHCPv6
  • static link-local
  • stateful DHCPv6
  • SLAAC

Question 85

Question
Refer to the exhibit. What should be done to allow PC-A to receive an IPv6 address from the DHCPv6 server?
Image:
Image (binary/octet-stream)
Answer
  • Configure the ipv6 nd managed-config-flag command on interface Fa0/1.
  • Add the IPv6 address 2001:DB8:1234:5678::10/64 to the interface configuration of the DHCPv6 server.
  • Change the ipv6 nd managed-config-flag command to ipv6 nd other-config-flag.
  • Add the ipv6 dhcp relay command to interface Fa0/0.

Question 86

Question
Refer to the exhibit. A network administrator is implementing stateful DHCPv6 operation for the company. However, the clients are not using the prefix and prefix-length information that is configured in the DHCP pool. The administrator issues a show ipv6 interface command. What could be the cause of the problem?
Image:
Image (binary/octet-stream)
Answer
  • No virtual link-local address is configured.
  • The router is configured for stateless DHCPv6 operation
  • The router is configured for SLAAC DHCPv6 operation.
  • The Duplicate Address Detection feature is disabled.

Question 87

Question
Refer to the exhibit. A network administrator is implementing the stateless DHCPv6 operation for the company. Clients are configuring IPv6 addresses as expected. However, the clients are not getting the DNS server address and the domain name information configured in the DHCP pool. What could be the cause of the problem?
Image:
Image (binary/octet-stream)
Answer
  • The GigabitEthernet interface is not activated.
  • The clients cannot communicate with the DHCPv6 server, evidenced by the number of active clients being 0.
  • The DNS server address is not on the same network as the clients are on.
  • The router is configured for SLAAC operation.

Question 88

Question
Which method is used by a PAT-enabled router to send incoming packets to the correct inside hosts?
Answer
  • It uses the destination TCP or UDP port number on the incoming packet.
  • It uses the source IP address on the incoming packet.
  • It uses the source TCP or UDP port number on the incoming packet.
  • It uses a combination of the source TCP or UDP port number and the destination IP address on the incoming packet

Question 89

Question
Refer to the exhibit. Which address or addresses represent the inside global address?
Image:
Image (binary/octet-stream)
Answer
  • 10.1.1.2
  • 209.165.20.25
  • 192.168.0.100
  • any address in the 10.1.1.0 network

Question 90

Question
A network administrator is configuring a static NAT on the border router for a web server located in the DMZ network. The web server is configured to listen on TCP port 8080. The web server is paired with the internal IP address of 192.168.5.25 and the external IP address of 209.165.200.230. For easy access by hosts on the Internet, external users do not need to specify the port when visiting the web server. Which command will configure the static NAT?
Answer
  • R1(config)# ip nat inside source static tcp 209.165.200.230 8080 192.168.5.25 80
  • R1(config)# ip nat inside source static tcp 209.165.200.230 80 192.168.5.25 8080
  • R1(config)# ip nat inside source static tcp 192.168.5.25 8080 209.165.200.230 80
  • R1(config)# ip nat inside source static tcp 192.168.5.25 80 209.165.200.230 8080

Question 91

Question
What is defined by the ip nat pool command when configuring dynamic NAT?
Answer
  • the pool of global address
  • the range of internal IP addresses that are translated
  • the range of external IP addresses that internal hosts are permitted to access
  • the pool of available NAT servers

Question 92

Question
Refer to the exhibit. Based on the output that is shown, what type of NAT has been implemented?
Image:
Image (binary/octet-stream)
Answer
  • dynamic NAT with a pool of two public IP addresses
  • static NAT with a NAT pool
  • static NAT with one entry
  • PAT using an external interface

Question 93

Question
What is the primary purpose of NAT?
Answer
  • enhance network performance
  • allow peer-to-peer file sharing
  • increase network security
  • conserve IPv4 addresses

Question 94

Question
What is the major benefit of using NAT with Port Address Translation?
Answer
  • It provides a pool of public addresses that can be assigned to internal hosts.
  • It allows many internal hosts to share the same public IPv4 address.
  • It improves network performance for real-time protocols.
  • It allows external hosts access to internal servers.

Question 95

Question
What is a characteristic of unique local addresses?
Answer
  • They are defined in RFC 3927.
  • Their implementation depends on ISPs providing the service.
  • They are designed to improve the security of IPv6 networks.
  • They allow sites to be combined without creating any address conflicts.

Question 96

Question
A network administrator configures the border router with the command R1(config)# ip nat inside source list 4 pool corp. What is required to be configured in order for this particular command to be functional?
Answer
  • a VLAN named corp to be enabled and active and routed by R1
  • ip nat outside to be enabled on the interface that connects to the LAN affected by the NAT
  • an access list numbered 4 that defines the starting and ending public IP addresses
  • an access list named corp that defines the private addresses that are affected by NAT
  • a NAT pool named corp that defines the starting and ending public IP addresses

Question 97

Question
Which statement describes IPv6 ULAs?
Answer
  • They are assigned by an ISP.
  • They are not routable across the internet.
  • They begin with the fe80::/10 prefix.
  • They conserve IPv6 address space.

Question 98

Question
What is the purpose of port forwarding?
Answer
  • Port forwarding allows an internal user to reach a service on a public IPv4 address that is located outside a LAN.
  • Port forwarding allows for translating inside local IP addresses to outside local addresses.
  • Port forwarding allows an external user to reach a service on a private IPv4 address that is located inside a LAN.
  • Port forwarding allows users to reach servers on the Internet that are not using standard port numbers.

Question 99

Question
When dynamic NAT without overloading is being used, what happens if seven users attempt to access a public server on the Internet when only six addresses are available in the NAT pool?
Answer
  • The first user gets disconnected when the seventh user makes the request.
  • All users can access the server.
  • The request to the server for the seventh user fails.
  • No users can access the server.

Question 100

Question
A network engineer has configured a router with the command ip nat inside source list 4 pool corp overload. Why did the engineer use the overload option?
Answer
  • The company has a small number of servers that should be accessible by clients from the Internet.
  • The company router must throttle or buffer traffic because the processing power of the router is not enough to handle the normal load of external-bound Internet traffic.
  • The company needs to have more public IP addresses available to be used on the Internet.
  • The company has more private IP addresses than available public IP addresses.

Question 101

Question
What is a disadvantage of NAT?
Answer
  • The costs of readdressing hosts can be significant for a publicly addressed network.
  • The internal hosts have to use a single public IPv4 address for external communication.
  • The router does not need to alter the checksum of the IPv4 packets.
  • There is no end-to-end addressing.

Question 102

Question
Refer to the exhibit. What is the purpose of the command marked with an arrow shown in the partial configuration output of a Cisco broadband router?
Image:
Image (binary/octet-stream)
Answer
  • defines which addresses can be translated
  • defines which addresses are allowed out of the router
  • defines which addresses are assigned to a NAT pool
  • defines which addresses are allowed into the router

Question 103

Question
What are two of the required steps to configure PAT? (Choose two.)
Answer
  • Define the hello and interval timers to match the adjacent neighbor router.
  • Identify the inside interface.
  • Define the range of source ports to be used.
  • Create a standard access list to define applications that should be translated.
  • Define a pool of global addresses to be used for overload translation.

Question 104

Question
Refer to the exhibit. A technician is configuring R2 for static NAT to allow the client to access the web server. What is a possible reason that the client PC cannot access the web server?
Image:
Image (binary/octet-stream)
Answer
  • Interface S0/0/0 should be identified as the outside NAT interface.
  • The configuration is missing a valid access control list
  • The IP NAT statement is incorrect.
  • Interface Fa0/1 should be identified as the outside NAT interface.

Question 105

Question
What are two benefits of NAT? (Choose two.)
Answer
  • It makes troubleshooting routing issues easier.
  • It makes tunneling with IPsec less complicated.
  • It increases routing performance. It makes troubleshooting routing issues easier.
  • It adds a degree of privacy and security to a network.
  • It saves public IP addresses.

Question 106

Question
What is an advantage of deploying IPv4 NAT technology for internal hosts in an organization?
Answer
  • enables the easy deployment of applications that require end-to-end traceability
  • increases the performance of packet transmission to the Internet
  • provides flexibility in designing the IPv4 addressing scheme
  • makes internal network access easy for outside hosts using UDP

Question 107

Question
A technician is required to configure an edge router to use a different TCP port number for each session with a server on the Internet. What type of Network Address Translation (NAT) should be implemented?
Answer
  • a many-to-one address mapping between local and global addresses
  • a one-to-many address mapping between local and global addresses
  • a one-to-one address mapping between local and global addresses
  • a many-to-many address mapping between local and global addresses
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