Kurose and Ross Edition 6 Exercise 2 Question R19 (Page No 170)

Question

Is it possible for an organization’s Web server and mail server to have exactly
the same alias for a hostname (for example, $foo.com$)? What would be the
type for the RR that contains the hostname of the mail server?

Answer 1

Yes an organization’s mail server and Web server can have the same alias for a host name. The MX record is used to map the mail server’s host name to its IP address.