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Network Address Translation - Networking MCQ Questions and answers

Learn Network Address Translation mcq questions and answers with easy and logical explanations for various competitive examination, interview and entrance test Page-2 section-1

11
Which command will allow you to see real-time translations on your router?
Discuss
Answer & Solution
Answer: Option C
Solution:
The command debug ip nat will show you in real time the translations occurring on your router.
12
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.
Discuss
Answer & Solution
Answer: Option A
Solution:
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.
13
Which of the following are advantages 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.
Discuss
Answer & Solution
Answer: Option D
Solution:
NAT is not perfect, but there are some advantages. It conserves global addresses, which allow us to add millions of hosts to the Internet without "real" IP addresses. This provides flexibility in our corporate networks. NAT can also allow you to use the same subnet more than once in the same network without overlapping networks.
14
Which of the following is considered to be the address before translation?
Discuss
Answer & Solution
Answer: Option A
Solution:
The host on the private network before translation is considered to be an inside local host.
15
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.
Discuss
Answer & Solution
Answer: Option A
Solution:
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.
16
Which of the following is considered to be the destination host after translation?
Discuss
Answer & Solution
Answer: Option D
Solution:
The host on the global network after translation is considered to be an outside global host.
17
Which command will create a dynamic pool named Todd that will provide you with 30 global addresses?
Discuss
Answer & Solution
Answer: Option B
Solution:
The command ip nat pool 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.
18
Which command will clear all the translations active on your router?
Discuss
Answer & Solution
Answer: Option D
Solution:
The command clear ip nat translations * will clear all the active NAT entries in your translation table.
19
Which of the following is considered to be the destination host after translation?
Discuss
Answer & Solution
Answer: Option D
Solution:
The host on the global network after translation is considered to be an outside global host.