ENSA - Module 6-8

1. Which two statements accurately describe an advantage or a disadvantage when deploying NAT for IPv4 in a network? (Choose two.)

• • NAT adds authentication capability to IPv4.

• • NAT will impact negatively on switch performance.

• • NAT causes routing tables to include more information.

• NAT provides a solution to slow down the IPv4 address depletion.

• NAT introduces problems for some applications that require end-to-end connectivity.

2. A network administrator wants to examine the active NAT translations on a border router. Which command would perform the task?

• Router# show ip nat translations

• • Router# show ip nat statistics

• • Router# clear ip nat translations

• • Router# debug ip nat translations

3. What are two tasks to perform when configuring static NAT? (Choose two.)

• • Configure a NAT pool.

• Create a mapping between the inside local and outside local addresses.

• Identify the participating interfaces as inside or outside interfaces.

• • Define the inside global address on the server

• • Define the outside global address.

4. What is a disadvantage of NAT?

• There is no end-to-end addressing.

• • The router does not need to alter the checksum of the IPv4 packets.​

• • The internal hosts have to use a single public IPv4 address for external communication.

• • The costs of readdressing hosts can be significant for a publicly addressed network.​

5. Refer to the exhibit. From the perspective of R1, the NAT router, which address is the inside global address?

• • 192.168.0.10

• • 192.168.0.1

• 209.165.200.225

• • 209.165.200.254

6. Refer to the exhibit. Given the commands as shown, how many hosts on the internal LAN off R1 can have simultaneous NAT translations on R1?

• 244

• 10

• 1

• 255

7. Refer to the exhibit. A network administrator has just configured address translation and is verifying the configuration. What three things can the administrator verify? (Choose three.)

• A standard access list numbered 1 was used as part of the configuration process.

• • Three addresses from the NAT pool are being used by hosts.

• Address translation is working.

• • The name of the NAT pool is refCount.

• Two types of NAT are enabled.

8. Refer to the exhibit. NAT is configured on RT1 and RT2. The PC is sending a request to the web server. What IPv4 address is the source IP address in the packet between RT2 and the web server?

• • 203.0.113.10

• • 172.16.1.254

• • 172.16.1.10

• 209.165.200.245

• • 192.0.2.2

9. Refer to the exhibit. Based on the output that is shown, what type of NAT has been implemented?

• • dynamic NAT with a pool of two public IP addresses

• PAT using an external interface

• • static NAT with a NAT pool

• • static NAT with one entry

10. Refer to the exhibit. From the perspective of users behind the NAT router, what type of NAT address is 209.165.201.1?

• • inside global

• • outside global

• • outside local

• • inside local