When creating a pool of global addresses, which of the following can be used instead of the netmask command?
Answer: B
Instead of the netmask command, you can use the prefix-length
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Which command will show you the summary of the NAT configuration?
Answer: B
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.
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Which command will allow you to see real-time translations on your router?
Answer: C
The command debug ip nat will show you in real time the translations occurring on your router.
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Which command would you place on interface on a private network?
Answer: A
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.
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Which command will create a dynamic pool named Todd that will provide you with 30 global addresses?
Answer: B
The command ip nat pool
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Port Address Translation is also termed what?
Answer: C
Another term for port address translation is NAT Overload because that is the command used to enable port address translation.
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Which of the following would be good reasons to run NAT?
1.You need to connect to the Internet and your hosts don't have globally unique IP addresses.
2.You change to a new ISP that requires you to renumber your network.
3.You don't want any hosts connecting to the Internet.
4.You require two intranets with duplicate addresses to merge.
Answer: A
The most popular use of NAT is if you want to connect to the Internet and you don't want hosts to have global (real) IP addresses, but option B and D are correct as well.
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Which of the following are disadvantages of using NAT?
1.Translation introduces switching path delays.
2.Conserves legally registered addresses.
3.Causes loss of end-to-end IP traceability.
4.Increases flexibility when connecting to the Internet.
5.Certain applications will not function with NAT enabled.
6.Reduces address overlap occurrence.
Answer: A
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.
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