扩建网吧全攻略（Expand the net bar）.doc

扩建网吧全攻略（Expand the net bar） Expand the net bar Generally there are 15 to 30 workstations in the Internet bar we can call medium Internet cafes. Compared with small Internet cafes, the number of medium Internet cafes has increased a lot. On the basic network, at least one 16-port HUB needs to be added to connect more computers. Network wiring topology is star type. The networking can be used to continue with 10M Ethernet technology. Therefore, medium Internet cafes recommend using ISDN technology access. ISDN is a communication network based on the telephone integrated digital network (IDN). It provides end-to-end digital connectivity and carries multiple telecommunications services, including voice and voice. Customers can access the network through a limited set of criteria. Its basic feature is a transparent transmission at the end to end of a 64kbps rate among users. There are two kinds of rate and interface standards for ISDN: one is the basic rate interface, which is 2B + D, where B is the digital channel of 64kbps and D is the digital channel of 16kbps; The other is the base group rate interface, also known as a group rate interface, namely 30B + D or 23B + D, where both B and D are digital channels of 64kbps. The ISDN business has been opened in major cities, including provincial capitals and coastal cities. At a time when the user is not very much, we can use 1B, and the communication cost is about the same as that of 56Kmodem, but the speed is much faster. It can be easily switched to 128kbps when there are more users. Of course, in order to share the ISDN connection, the medium Internet bar also requires a gateway server, which requires the installation of proxy server software on the gateway server. The proxy server software should also provide the cache function except for the multi-machine sharing connection. Because simply raising the Internet speed is always limited. Proxy server host is usually on the hard drive can also set the CACHE (CACHE), namely