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Different network workstations k? Can data between servers on the existence of the agreement. With the development of several developers with different means of communication. To make a successful and reliably? Ssiger communications network to all hosts have m? Must have the same language, not dialect. Developed between the stringent standards defined f, For every package in the Host every word of each.? These standards come from the Bem? Efforts of various organizations, agreed common good communication? N Mlich the agreement. These are to facilitate communication.? Developed a series of agreements, but only a few survived. For these agreements in a number of Gr? Nd — The design is not good, bad or lack of Reinforcing its reach Tzung. The agreement to keep that through the test of time and an effective communication method. Today, the three g expecting the LAN protocol is Microsoft’s NetBEUI, Novell IPX / SPX and cross-platform TCP / IP.? 1, NetBEUI NetBEUI development f? r no routing protocol f? r the performing? Channel by IBM NetBIOS communications. skills NETBEUI lack of network layer routing and addressing F? is his gr? ter advantage is its gr? te Schw? surface. Because there is no PC! Additional network address and network layer end to end so quickly and is very effective and f? R only a single network or the environment are together a small working environment? Berbr Cruise Control.’s Because they do not bottom and keeping your routing, so NETBEUI never will be the main protocol enterprise networks. Frame NetBEUI address is only the Data Link Layer Media Access Control (MAC) address, the address identifies the network card, but do not identify the network. With the network address of the router forwards the frame to the final destination, the F v? Llige lack of information NetBEUI Frame.? Bridge, the Data Link Layer address? R the network communication between the ball, but there are many disadvantages . Because all radio links m? Have to each network? Be transferred, so that the broadening of the Br cke? Is bad. NETBEUI particularly the wireless connection to z? And choose to rely on them to this name conflicts l?. In general, the network bridge NETBEUI is little more than 100 hosts.? Dependence are expecting from the second level in recent years, the network switches h? Become more often. Complete change of environment reduces network load, w? While radio is still forwarded to the network from any host. In fact, the combined use of 100-BASE-TEthernet, so conversion NetBIOS network to 350 hosts to broadcast communications and to avoid a serious problem.? 2, IPX / SPX IPX uses Novell client / server protocol group NetWare, NetBEUI Schw avoid?’s. However, IPX routing with full capacitance? Tf? R big e enterprise networks. It allows a number of network routing. Including normal 32-bit network address, in a single environment and other new Schw?’s Been.? IPX scalability through its senior broadcast communications, and the high cost limits. SAP (Service Advertising Protocol, SAP) is the number of routing in the network host is descr? Nkt to a few thousand. Although the boundaries of the SAP has been configured by the intelligent routers and servers to overcome?, However, is large? IPX network administrator is still extremely difficult.? 3, TCP / IP networking protocol Everyone has their own advantages, but only TCP / IP erm? Created the possibility for complete with Internet connection. TCP / IP is nd in the 60 years from the Massachusetts Institute of Technology and a number of Wirtschaftsverb?, F? R the U.S. Department of Defense designed to destroy even if a nuclear attack and the most network ? ren, TCP / IP is still able to maintain effective communication. ARPANET was developed by the log-based, and developed in the exchange of scientists and engineers, such as the Internet media.