Cisco Exam 300-720 Topic 16 Question 79 Discussion

Actual exam question for Cisco's 300-720 exam

Question #: 79
Topic #: 16

[All 300-720 Questions]

Which type of DNS record would contain the following line, which references the DKIM public key per RFC 6376?

v=DKIM1; p=76E629F05F709EF665853333EEC3F5ADE69A2362BECE406582670456943283BE

ACNAME

BAAAA

CTXT

DPTR

Show Suggested Answer

Suggested Answer: C

A TXT record is a type of DNS record that contains arbitrary text data that can be used for various purposes such as verification, configuration, or authentication. A TXT record can contain the DKIM public key per RFC 6376, which is used to verify the digital signature of an email message generated by the DKIM private key of the sender domain.

The other options are not valid because:

A) A CNAME record is a type of DNS record that maps an alias name to a canonical name or another alias name. It does not contain any DKIM public key information.

B) An AAAA record is a type of DNS record that maps a hostname to an IPv6 address. It does not contain any DKIM public key information.

D) A PTR record is a type of DNS record that maps an IP address to a hostname, which is the reverse of an A or AAAA record. It does not contain any DKIM public key information.

by Penney at Mar 17, 2024, 11:37 AM

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Merissa

4 months ago

I believe A) CNAME and B) AAAA are not the right choices because a CNAME record is used for aliases and an AAAA record is for IPv6 addresses.

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Brice

4 months ago

I'm not sure about this one. Can anyone explain why the other options wouldn't be correct?

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Sherita

4 months ago

I agree with Jess. TXT records are commonly used for storing various types of information, including DKIM keys.

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Jess

4 months ago

I think the answer is C) TXT because it can store text-based information like DKIM public keys.

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Devora

4 months ago

I see your point, Mabel, but in this case, the information is related to a DKIM key, so TXT record seems more appropriate.

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Mabel

4 months ago

I'm not sure, but I think it could be A) CNAME because it's used for aliasing one domain name to another.

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Barabara

5 months ago

I agree with Devora, because TXT records are commonly used to store text-based information like DKIM keys.

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Devora

5 months ago

I think the answer is C) TXT.

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Deja

6 months ago

Haha, yeah, no need to overthink this one. It's like they're asking us the definition of a TXT record - easy peasy!

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Shenika

6 months ago

Yeah, this is a straightforward one. The DKIM public key is a text-based value, so it makes sense to store it in a TXT record. I'm glad they're not trying to trick us with some obscure DNS record type.

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Jettie

6 months ago

Agreed, the TXT record is the correct answer. The question mentions the DKIM public key, which is specified in RFC 6376, and that's exactly the type of information that goes in a TXT record.

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Barney

5 months ago

Agreed, the TXT record is the correct answer. The question mentions the DKIM public key, which is specified in RFC 6376, and that's exactly the type of information that goes in a TXT record.

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Slyvia

5 months ago

D) PTR

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Kate

5 months ago

C) TXT

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Nicholle

5 months ago

B) AAAA

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Carlene

5 months ago

A) CNAME

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Xenia

6 months ago

I'm pretty sure this is a TXT record. The DKIM public key is typically stored in a TXT record, which is used to verify the digital signature of an email message.

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