3[1]ANDREW S, TANENBAUM. translator:. PAN AM. Computer Networks [M]. Tsinghua University Publishing Company,2004-8-1. Chinese
4[2]LA HQ. Safe practice and method of the computer network [J].Microcomputer and App Journal, 1998, 17(10): 1. Chinese
5[3]LI ZB, WNAG XL. Technology of fire wall and developing and using analysi[J]. Rap off Science and Technology, Science and Technology Intercourse Journal, 2004, 034: 003. Chinese
6[4]LI J. Thinking about the information safety of the network[J]. Huanan Economy Computer Journal, 2004, 012(005): 19-20. Chinese
7[5]HAO JE, HOU EW, BAI YF. Operation technique of the computer and encrypting [J]. Machine Engineering Technic Journal,2004, 033(066). Chinese
