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In this chapter, we presented a troubleshooting blueprint
that recommends that you start troubleshooting from the Physical
layer, then move up the OSI layers through the Data Link and Network
layers to the network application. The basic troubleshooting
scenario presented in Chap. 3 was reviewed, followed by
troubleshooting for serial interfaces, asynchronous communications,
Ethernet, Token-Ring, frame relay, and X.25 protocols. |
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