Linux and Unix are operating systems placed on servers or host computers, networking is the connecting system that allows operating systems to talk to each other and clients.

Linux is derived from Unix. although both have open source code at one time not all of it is now.

Both use TCP/IP to talk to clients although they can use other protocols.

Unix is the older language of the family and Linux has cleaned up some commands and is a little more versatile on which hardware platform it can be run. Most of Unix of old required line commands to do everything, however the GUI has made most systems look the same.

Uhm… nooo…. Unix networking has about zero to do with mainframes.

Actually, Unix networking and Linux networking are pretty darned close with little or no exceptions.

Where are you getting your information from? Where ever it is, its bad information. Don’t go there any more.