Monitoring Network Hosts
On a shared network medium, monitoring only the client and server systems is insufficient. Other network devices may be critical for network connectivity. Name servers were previously discussed; if the name service is unavailable, your application may be unable to connect to the server, because it can't determine the server's IP address. The router responsible for transferring your packets to the server's LAN segment may also be down.
In addition to network faults, performance problems could occur. Congestion on a shared LAN can prevent your data from being transmitted. Performance monitoring tools are discussed in the next section.
Other network devices, or hosts, may also be interesting to monitor, such as a network ...
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