Juniper Exam JN0-335 Topic 7 Question 28 Discussion

Actual exam question for Juniper's JN0-335 exam

Question #: 28
Topic #: 7

[All JN0-335 Questions]

Which two statements about the DNS ALG are correct? (Choose two.)

AThe DNS ALG supports DDNS.

BThe DNS ALG supports VPN tunnels.

CThe DNS ALG performs DNS doctoring.

DThe DNS ALG does not support NAT.

Show Suggested Answer

Suggested Answer: A, C

The DNS ALG is an application layer gateway that handles data associated with locating and translating domain names into IP addresses. It runs on port 53 and monitors DNS query and reply packets. Two statements about the DNS ALG that are correct are:

The DNS ALG supports DDNS: DDNS is Dynamic DNS, which is a method of updating DNS records in real time to reflect changes in network configurations or hostnames. The DNS ALG can process DDNS messages differently from DNS messages and perform address translation in the query part of the message.

The DNS ALG performs DNS doctoring: DNS doctoring is a technique of modifying the DNS reply packets to replace the original IP addresses with translated IP addresses that are suitable for the destination network. This allows the clients to access servers that are located behind NAT devices or in different networks.

by Franchesca at Jun 01, 2024, 09:28 AM

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Lonna

4 months ago

I'm pretty sure the DNS ALG doesn't support DDNS. That's like asking a cat to fetch a ball. C and D are the obvious choices here.

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Laila

4 months ago

Wait, what's a DNS ALG? Is it like a superhero that fights against malicious domain names? In that case, I'd say all of the above are correct! Kapow!

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Lenna

4 months ago

C) The DNS ALG performs DNS doctoring.

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Janna

4 months ago

A) The DNS ALG supports DDNS.

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Sherell

5 months ago

Hmm, I'm not so sure about B. Isn't the DNS ALG more focused on handling DNS traffic, rather than VPN stuff? I'd go with C and D.

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Elvera

4 months ago

Yeah, I agree. It does perform DNS doctoring and does not support NAT.

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Luisa

4 months ago

I think you're right, the DNS ALG does focus more on DNS traffic.

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Jovita

5 months ago

I think B is also correct. The DNS ALG should support VPN tunnels, right? Otherwise, how would it handle DNS queries over a VPN connection?

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Merlyn

4 months ago

Yes, you're right. B) The DNS ALG supports VPN tunnels.

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Isreal

4 months ago

C) The DNS ALG performs DNS doctoring.

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Brinda

4 months ago

A) The DNS ALG supports DDNS.

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Shantell

5 months ago

Yes, you are correct. The DNS ALG should support VPN tunnels to handle DNS queries over a VPN connection.

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Karon

5 months ago

C) The DNS ALG performs DNS doctoring.

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Rozella

5 months ago

A) The DNS ALG supports DDNS.

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Sheldon

5 months ago

C and D seem to be the correct options here. The DNS ALG definitely performs DNS doctoring, and it doesn't support NAT.

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Marge

4 months ago

D) The DNS ALG does not support NAT.

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Audria

5 months ago

C) The DNS ALG performs DNS doctoring.

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Hubert

5 months ago

I agree, D is also correct because the DNS ALG does not support NAT.

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Peggie

5 months ago

D) The DNS ALG does not support NAT.

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Mable

5 months ago

I think C is correct because the DNS ALG performs DNS doctoring.

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Peggie

5 months ago

C) The DNS ALG performs DNS doctoring.

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Charlesetta

6 months ago

I agree with you, Tamesha. I also believe statement C is correct because the DNS ALG can perform DNS doctoring.

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Tamesha

6 months ago

I think statement A is correct because the DNS ALG does support DDNS.

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