Chapter 11 - DNS Hierarchies

Question 1

Rather than creating CNAME records, what is the preferred method to create aliases?

Answer 1

Multiple A records

Question 2

Why is it important to create PTR records?

Answer 2

Reverse Lookups

Question 3

What is the importance of NS records?

Answer 3

Specifying the nameservers

Question 4

What is a CNAME record?

Answer 4

An alias.

Question 5

What is a MX record?

Answer 5

A mail record

Question 6

How would you configure DNS Round Robin for multiple mail records?

Answer 6

Configure multiple MX records with the same priority

Question 7

You have to create PTR records for 250 new computers, which command will make them for you in one command?

Answer 7

$GENERATE 1-250 $ PTR host$.example.com.

Question 8

Where is the origin defined for a zone?

Answer 8

In the /etc/named.conf file, or in the zone file using $ORIGIN

Question 9

On one line, you have an A record for Host1, on the line below it you have the record type and a IP address, but no hostname. What hostname does that record use?

Answer 9

Host1.

Question 10

Identify 3 main reasons why you would create subdomains.

Answer 10

Administration, Geographic, or Organization Distribution