What are network protocols?
Computers need to abide by certain regulations together to communicate normally via network (involving internet), these regulations are so called network protocols. Network protocols are usually sorted into several layers and each layer has its own functions. A computer must comply with network protocols in order to communicate with others, and only those on a same protocol layer may contact each other. TCP/IP and IPX/SPX are two most popular protocols, the prior is used widely on internet, and the latter is used normally on intranet.
