NAT (Network Address Translation)

1. What does CIDR stand for?
a. Classful IP default routing
b. Classful IP D-class routing
c. Classful interdomain routing
d. Classless IP default routing
e. Classless IP D-class routing
f. Classless interdomain routing
2. Which of the following summarized subnets represent routes that could have been created
for CIDR’s goal to reduce the size of Internet routing tables?
a. 10.0.0.0 255.255.255.0
b. 10.1.0.0 255.255.0.0
c. 200.1.1.0 255.255.255.0
d. 200.1.0.0 255.255.0.0
3. Which of the following are not private addresses according to RFC 1918? (Choose two
answers.)
a. 172.31.1.1
b. 172.33.1.1
c. 10.255.1.1
d. 10.1.255.1
e. 191.168.1.1
4. With static NAT, performing translation for inside addresses only, what causes NAT table
entries to be created?
a. The first packet from the inside network to the outside network
b. The first packet from the outside network to the inside network
c. Configuration using the ip nat inside source command
d. Configuration using the ip nat outside source command
5. With dynamic NAT, performing translation for inside addresses only, what causes NAT
table entries to be created?
a. The first packet from the inside network to the outside network
b. The first packet from the outside network to the inside network
c. Configuration using the ip nat inside source command
d. Configuration using the ip nat outside source command

6. NAT has been configured to translate source addresses of packets for the inside part of
the network, but only for some hosts as identified by an access control list. Which of the
following commands indirectly identifies the hosts?
a. ip nat inside source list 1 pool barney
b. ip nat pool barney 200.1.1.1 200.1.1.254 netmask 255.255.255.0
c. ip nat inside
d. ip nat inside 200.1.1.1 200.1.1.2
7. Examine the following configuration commands:
interface Ethernet0/0
ip address 10.1.1.1 255.255.255.0
ip nat inside
interface Serial0/0
ip address 200.1.1.249 255.255.255.252
ip nat inside source list 1 interface Serial0/0
access-list 1 permit 10.1.1.0 0.0.0.255
If the configuration is intended to enable source NAT overload, which of the following
commands could be useful to complete the configuration? (Choose two answers.)
a. The ip nat outside command
b. The ip nat pat command
c. The overload keyword
d. The ip nat pool command
8. Examine the following show command output on a router configured for dynamic NAT:
— Inside Source
access-list 1 pool fred refcount 2288
pool fred: netmask 255.255.255.240
start 200.1.1.1 end 200.1.1.7
type generic, total addresses 7, allocated 7 (100%), misses 965
Users are complaining about not being able to reach the Internet. Which of the following
is the most likely cause?
a. The problem is not related to NAT, based on the information in the command output.
b. The NAT pool does not have enough entries to satisfy all requests.
c. Standard ACL 1 cannot be used; an extended ACL must be used.
d. The command output does not supply enough information to identify the
problem.