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1. บรรณานุกรม http://th.wikipedia.org/wiki/%E0%B9%80%E0%B8%84%E0%B8%A3%E0%B8%B7%E0%B8 %AD%E0%B8%82%E0%B9%88%E0%B8%B2%E0%B8%A2%E0%B8%84%E0%B8%AD%E 0%B8%A1%E0%B8%9E%E0%B8%B4%E0%B8%A7%E0%B9%80%E0%B8%95%E0%B8% AD%E0%B8%A3%E0%B9%8C http://www.school.net.th/library/snet1/hardware/network.html http://www.rayongwit.ac.th/comcen09/network/lesson7.htm http://www.bcoms.net/network/intro.asp