Is TCP IP used for everything?

Answer:
No, TCP/IP is the not the only protocol used in the world, but it is certainly one of the most popular. Older networks may still use IPX/SPX (Novell) which is a competitor to TCP/IP. Mainframes use SNA or LU6.2 protocols which are very different from TCP/IP. Appletalk is also a competitor to TCP/IP.
First answer by Enigmamerlin. Last edit by Enigmamerlin. Contributor trust: 107 [recommend contributor recommended]. Question popularity: 2 [recommend question].