Cisco: Routing and Switching Final Exam
Refer to the exhibit. A network administrator is configuring a router as a DHCPv6 server. The
administrator issues a show ipv6 dhcp pool command to verify the configuration. Which statement
explains the reason that the number of active clients is 0?
IMAGE ATTACHED
a. The default gateway address is not provided in the pool.
b. No clients have communicated with the DHCPv6 server yet.
c. The IPv6 DHCP pool configuration has no IPv6 address range specified.
d. The state is not maintained by the DHCPv6 server under stateless DHCPv6 operation. Correct Answer:
The state is not maintained by the DHCPv6 server under stateless DHCPv6 operation.
Which command, when issued in the interface configuration mode of a router, enables the interface to
acquire an IPv4 address automatically from an ISP, when that link to the ISP is enabled?
a. ip dhcp pool
b. ip address dhcp*
c. service dhcp
d. ip helper-address Correct Answer: ip address dhcp
Which kind of message is sent by a DHCP client when its IP address lease has expired? Correct Answer: a
DHCPREQUEST unicast message
Refer to the exhibit. R1 has been configured as shown. However, PC1 is not able to receive an IPv4
address. What is the problem?
IMAGE ATTACHED Correct Answer: The ip helper-address command was applied on the wrong
interface.
A college marketing department has a networked storage device that uses the IP address 10.18.7.5, TCP
port 443 for encryption, and UDP port 4365 for video streaming. The college already uses PAT on the
router that connects to the Internet. The router interface has the public IP address of
209.165.200.225/30. The IP NAT pool currently uses the IP addresses ranging from 209.165.200.228-
236. Which configuration would the network administrator add to allow this device to be accessed by
the marketing personnel from home? Correct Answer: ip nat inside source static tcp 10.18.7.5 443
209.165.200.225 443
ip nat inside source static udp 10.18.7.5 4365 209.165.200.225 4365
What is a disadvantage of NAT? Correct Answer: There is no end-to-end addressing.
Which type of traffic would most likely have problems when passing through a NAT device? Correct
Answer: IPsec
, What benefit does NAT64 provide? Correct Answer: It allows sites to connect IPv6 hosts to an IPv4
network by translating the IPv6 addresses to IPv4 addresses.
Refer to the exhibit. The Gigabit interfaces on both routers have been configured with subinterface
numbers that match the VLAN numbers connected to them. PCs on VLAN 10 should be able to print to
the P1 printer on VLAN 12. PCs on VLAN 20 should print to the printers on VLAN 22. What interface and
in what direction should you place a standard ACL that allows printing to P1 from data VLAN 10, but
stops the PCs on VLAN 20 from using the P1 printer? (Choose two.)
IMAGE ATTACHED Correct Answer: R1 Gi0/1.12
outbound
Which two packet filters could a network administrator use on an IPv4 extended ACL? (Choose two.)
Correct Answer: ICMP message type
destination UDP port number
A network administrator is explaining to a junior colleague the use of the lt and gt keywords when
filtering packets using an extended ACL. Where would the lt or gt keywords be used? Correct Answer: in
an IPv4 extended ACL that allows packets from a range of TCP ports destined for a specific network
device
Which three values or sets of values are included when creating an extended access control list entry?
(Choose three.) Correct Answer: access list number between 100 and 199
destination address and wildcard mask
source address and wildcard mask
A network administrator is designing an ACL. The networks 192.168.1.0/25, 192.168.0.0/25,
192.168.0.128/25, 192.168.1.128/26, and 192.168.1.192/26 are affected by the ACL. Which wildcard
mask, if any, is the most efficient to use when specifying all of these networks in a single ACL permit
entry? Correct Answer: 0.0.1.255
The computers used by the network administrators for a school are on the 10.7.0.0/27 network. Which
two commands are needed at a minimum to apply an ACL that will ensure that only devices that are
used by the network administrators will be allowed Telnet access to the routers? (Choose two.) Correct
Answer: access-class 5 in
access-list 5 permit 10.7.0.0 0.0.0.31
A network administrator is adding ACLs to a new IPv6 multirouter environment. Which IPv6 ACE is
automatically added implicitly at the end of an ACL so that two adjacent routers can discover each
other? Correct Answer: permit icmp any any nd-na
Refer to the exhibit. A network administrator is configuring a router as a DHCPv6 server. The
administrator issues a show ipv6 dhcp pool command to verify the configuration. Which statement
explains the reason that the number of active clients is 0?
IMAGE ATTACHED
a. The default gateway address is not provided in the pool.
b. No clients have communicated with the DHCPv6 server yet.
c. The IPv6 DHCP pool configuration has no IPv6 address range specified.
d. The state is not maintained by the DHCPv6 server under stateless DHCPv6 operation. Correct Answer:
The state is not maintained by the DHCPv6 server under stateless DHCPv6 operation.
Which command, when issued in the interface configuration mode of a router, enables the interface to
acquire an IPv4 address automatically from an ISP, when that link to the ISP is enabled?
a. ip dhcp pool
b. ip address dhcp*
c. service dhcp
d. ip helper-address Correct Answer: ip address dhcp
Which kind of message is sent by a DHCP client when its IP address lease has expired? Correct Answer: a
DHCPREQUEST unicast message
Refer to the exhibit. R1 has been configured as shown. However, PC1 is not able to receive an IPv4
address. What is the problem?
IMAGE ATTACHED Correct Answer: The ip helper-address command was applied on the wrong
interface.
A college marketing department has a networked storage device that uses the IP address 10.18.7.5, TCP
port 443 for encryption, and UDP port 4365 for video streaming. The college already uses PAT on the
router that connects to the Internet. The router interface has the public IP address of
209.165.200.225/30. The IP NAT pool currently uses the IP addresses ranging from 209.165.200.228-
236. Which configuration would the network administrator add to allow this device to be accessed by
the marketing personnel from home? Correct Answer: ip nat inside source static tcp 10.18.7.5 443
209.165.200.225 443
ip nat inside source static udp 10.18.7.5 4365 209.165.200.225 4365
What is a disadvantage of NAT? Correct Answer: There is no end-to-end addressing.
Which type of traffic would most likely have problems when passing through a NAT device? Correct
Answer: IPsec
, What benefit does NAT64 provide? Correct Answer: It allows sites to connect IPv6 hosts to an IPv4
network by translating the IPv6 addresses to IPv4 addresses.
Refer to the exhibit. The Gigabit interfaces on both routers have been configured with subinterface
numbers that match the VLAN numbers connected to them. PCs on VLAN 10 should be able to print to
the P1 printer on VLAN 12. PCs on VLAN 20 should print to the printers on VLAN 22. What interface and
in what direction should you place a standard ACL that allows printing to P1 from data VLAN 10, but
stops the PCs on VLAN 20 from using the P1 printer? (Choose two.)
IMAGE ATTACHED Correct Answer: R1 Gi0/1.12
outbound
Which two packet filters could a network administrator use on an IPv4 extended ACL? (Choose two.)
Correct Answer: ICMP message type
destination UDP port number
A network administrator is explaining to a junior colleague the use of the lt and gt keywords when
filtering packets using an extended ACL. Where would the lt or gt keywords be used? Correct Answer: in
an IPv4 extended ACL that allows packets from a range of TCP ports destined for a specific network
device
Which three values or sets of values are included when creating an extended access control list entry?
(Choose three.) Correct Answer: access list number between 100 and 199
destination address and wildcard mask
source address and wildcard mask
A network administrator is designing an ACL. The networks 192.168.1.0/25, 192.168.0.0/25,
192.168.0.128/25, 192.168.1.128/26, and 192.168.1.192/26 are affected by the ACL. Which wildcard
mask, if any, is the most efficient to use when specifying all of these networks in a single ACL permit
entry? Correct Answer: 0.0.1.255
The computers used by the network administrators for a school are on the 10.7.0.0/27 network. Which
two commands are needed at a minimum to apply an ACL that will ensure that only devices that are
used by the network administrators will be allowed Telnet access to the routers? (Choose two.) Correct
Answer: access-class 5 in
access-list 5 permit 10.7.0.0 0.0.0.31
A network administrator is adding ACLs to a new IPv6 multirouter environment. Which IPv6 ACE is
automatically added implicitly at the end of an ACL so that two adjacent routers can discover each
other? Correct Answer: permit icmp any any nd-na
