It is important to categorize DNS records according to the kind they are. Give a brief description of each, along with examples and a rationale for its use. Is it possible to use the same alias for...

It is important to categorize DNS records according to the kind they are. Give a brief description of each, along with examples and a rationale for its use. Is it possible to use the same alias for the hostname of a web server and a mail server in the same organization?