This article will introduce you to common network protocols and lead you into the mysterious world of network protocols. Common protocols for computer networks are: TCP/IP, IPX/SPX, and NetBEUI. IPX/SPX is used in LANs. If users access the Internet, they must add the TCP/IP protocol to the network protocol. A: TCP /IP protocol transmissionControlProtocol /InternetProtocol shorthand Chinese translation is called Transmission Control Protocol /Internet Protocol. TCP/IP (Transmission Control Protocol/Internet Protocol) is a network communication protocol that regulates all communication devices on the network, especially the data exchange format and transmission mode between one host and another. TCP/IP is the basic protocol of INTERNET and a standard method for packaging and addressing computer data. In data transfer, it can be visually understood as having two envelopes. TCP and IP are like envelopes. The information to be transmitted is divided into segments, each segment is inserted into a TCP envelope, and records are recorded on the envelope. The segment number information, and then the TCP envelope is inserted into the IP large envelope and sent to the Internet. At the receiving end, a TCP package collects the envelopes, extracts the data, restores them in the order before they were sent, and verifies them. If an error is found, TCP will request a retransmission. Therefore, TCP/IP can transmit data almost without errors in the Internet. For ordinary users, you don't need to know the whole structure of the network protocol. You only need to know the IP address format to communicate with the world. Two: IPX/SPX protocol is based on Xerox's XEROX'SNetworkSystem (XNS) protocol, and SPX is based on Xerox's XEROX'SSPP (Sequenced Packet Protocol) protocol, which are all developed by Novell for LAN. High speed protocol. One significant difference between it and TCP/IP is that instead of using an ip address, it uses the physical address of the NIC, the (Mac) address. In actual use, it basically does not require any settings, and it can be used when installed. Because it played a huge role in the early days of network popularization, it has received support from many vendors, including Microsoft, and many software and hardware support such protocols. Third: NetBEUI protocol NetBiosEnhancedUserInterface, or NetBios enhanced user interface, it is an enhanced version of the NetBiOS protocol, has been adopted by many operating systems, such as WindowsforWorkgroup, Win9x series, WindowsNT and so on. The NETBEUI protocol is useful in many situations and is the default protocol for operating systems prior to Windows 98. In short, the NetBEUI protocol is a short-lived, high-efficiency, broadcast-type protocol that does not require setup after installation, and is particularly suitable for transmitting data in "network neighbors." Therefore, in addition to the TCP/IP protocol, it is recommended that the LAN computer should also be equipped with the NetBEUI protocol. Another point to note is that if a Windows 98 machine with only the TCP/IP protocol is added to the WINNT domain, the NetBEUI protocol must also be installed.