Cisco routers contain many troubleshooting and troubleshooting tools, but this chapter focuses on situations where the network cannot be analyzed using these tools, including detecting physical layer failures in WANs and analyzing higher-level protocols and packets in LANs.
This chapter discusses several different types of testing tools. It includes network management tools and how to use them to diagnose, resolve, and avoid network problems, and explains the difference between network monitoring and network management. It is worth mentioning that this chapter will also discuss the Simple Network Management Protocol (SNMP), as well as network management software packages and platforms based on this protocol.
The issues discussed in this chapter cover a wide range of issues, including network management and network analysis. When introducing different issues, the author first gives a brief introduction to the issues so that readers can understand the key points of the issues discussed. Detailed coverage of cable testing, network management, and network analysis is beyond the scope of this book, as these issues are only ancillary to the central issues discussed in this book.
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