Question

what is secondary name of file also known as first name or extension

Answer 1

Answer:

Name Server is a name server that downloads its Domain Name System (DNS) database of resource records from a master name server.

Answer 2

Answer:

Explanation:

A file extension (or simply "extension") is the suffix at the end of a filename that indicates what type of file it is. For example, in the filename "myreport. txt," the . ... While most file extensions are three characters in length, they can be as short as one character or longer than twenty characters.