Consider the following mail exchange entry:
hello.com IN MX 15mail1.hello.com
Which of the following can you determine from only this entry?

A.
The number of mail servers at hello.com

B.
The IP addresses of the e-mail server at hello.com

C.
The priority of the record.

D.
The type of mail server.

Explanation:
The number 15 is the priority of the record.
Incorrect Answers:
A: This record points to the server, but unless you collect other information, you can’tdetermine
how many servers actually exist.
B: The IP address of the mail server is not in this record. You need to do a lookup inDNS to find
the IP address.

D: The type of mail server is not expressed in the MX record.