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n Host puter using the external printing device and munications equipment to print and access the Internet. In this process, host puter is just a keyboard and mouse mands sent to the remote puter, while host puter39。s screen image e through the munication line return. That is, we control the host puter to operate in front of the puter seems to be carried out, in essence, a remote puter to achieve, whether to open the file, or Web browsing, downloading, all the information and the Internet are all Stored in the remote host puter. Implementation of remote control, in fact, a server program (hereinafter referred to as charged program) and a client (hereinafter referred to as master control program), the prosecution is the server program that listens to customer requests, and to deal with it。 Master Is the client side, it is connected to the server, to make their request, the server will be made ??according to customer39。s request a different response. Remote control system shown in Figure 1. Today39。s technical support network remote control methods are: LAN, WAN, dialup Internet way. In addition, some remote control software also supports serial, parallel, infrared port to control a remote machine. Remote control to overe regional differences in the operation brought the inconvenience, make the network to play a greater efficiency.2 remote control technology Principles of remote control As long as the network has access to connect remote control , remote control must be carried out through the network. At local, has been installed, the host is a client program to issue control instructions side, it is the same as an ordinary customer to nonlocal, the installation of the host server program signals, and through the establishment of a special Remote service, using a variety of remote control function to send a remote co