2.6 – DNS [Records]

Question 1

A

Answer 1

Resolves a name to an IPv4 address

example.com => 123.234.34.56

Question 2

AAAA

Answer 2

Resolves a name to an IPv6 address

example.com =
2101:2345:6789:abcd:ef01:2345:6789:abcd

Question 3

TXT [SPF]

Answer 3

Sender Policy Framework

*list of hostnames/IP & IPv6 addresses that mail can be sent from

managing SPAM
o So someone can’t setup a fake email server & try to spoof / email

Question 4

TXT [DKIM]

Answer 4

Domain Keys Identified Mail

*provides authentication of mail being sent and received to prevent spam

incorrect key means CAN’T send / receive email

Question 5

TXT [DMARC]

Answer 5

Domain-based Message Authentication, Reporting, & Conformance

*controls what happens if authentication FAILS to prevent spam

Question 6

CNAME

Answer 6

Canonical [Chronological] Name records

*resolves an alias to a domain name

*Allows you to have other domain names associated

bn.com=> barnesandnoble.com

Question 7

MX

Answer 7

Resolves a name to a mail exchanger [email server]

imap.gmail.com => 142.250.31.108