Fill the blank : 1- .... XXXXXXXXXXport number will be used by POP3 protocol. 2- When a opening and closing tag is used with a text content is called as .............................. 3- Suppose if...

Fill the blank :

1- ....................... port number will be used by POP3 protocol.

2- When a opening and closing tag is used with a text content is called as ..............................

3-

Suppose if you want to scan for computers in the network ........................ application will be used.