Which command would you place on interface on a private network?
Options
A. ip nat inside
B. ip nat outside
C. ip outside global
D. ip inside local
Correct Answer
ip nat inside
Explanation
As in access-lists, you must configure your interfaces before NAT will provide any translations. On the inside networks you would use the command
ip nat inside. On the outside interface, you will use the command
ip nat outside.
Network Address Translation problems
Search Results
1. Which command will clear all the translations active on your router?
The
show ip nat statistics command displays a summary of the NAT configuration as well as counts of active translation types, hits to an existing mapping, misses (causing an attempt to create a mapping), and expired translations.
4. Which command will create a dynamic pool named Todd that will provide you with 30 global addresses?
Options
A. ip nat pool Todd 171.16.10.65 171.16.10.94 net 255.255.255.240
B. ip nat pool Todd 171.16.10.65 171.16.10.94 net 255.255.255.224
C. ip nat pool todd 171.16.10.65 171.16.10.94 net 255.255.255.224
D. ip nat pool Todd 171.16.10.1 171.16.10.254 net 255.255.255.0
Correct Answer: ip nat pool Todd 171.16.10.65 171.16.10.94 net 255.255.255.224
Explanation:
The command
ip nat pool <name> creates the pool that hosts can use to get onto the global Internet. What makes option B correct is that the range 171.16.10.65 through 171.16.10.94 includes 30 hosts, but the mask has to match 30 hosts as well, and that mask is 255.255.255.224. Option C is wrong because the pool name has a lower case "T" in the pool name. Pool name's are case sensitive.
5. Which of the following are disadvantages of using NAT?
Translation introduces switching path delays.
Conserves legally registered addresses.
Causes loss of end-to-end IP traceability.
Increases flexibility when connecting to the Internet.
Certain applications will not function with NAT enabled.
NAT is not perfect and can cause some issues in some networks, but most networks work just fine. NAT can cause delays and troubleshooting problems, and some applications just won't work.
As in access-lists, you must configure your interfaces before NAT will provide any translations. On the inside networks you would use the command
ip nat inside. On the outside interface, you will use the command
ip nat outside.