Using Troubleshooting Tools

Using Troubleshooting Tools

Network administrators use a number of tools for searching out network problems. The following list details some of these tools:

Protocol Analyzers. These hardware or combined hardware and software products are used to monitor network traffic, track network performance, and analyze packets. Protocol analyzers can identify bottlenecks, protocol problems, and malfunctioning network components (see Chapter 12, “Monitoring the Network”).
Network Monitors. These software-based tools monitor network traffic, displaying packet information and keeping statistics on network usage (see Chapter 12).
Digital Volt Meter (DVM). This hand-held electronic measuring tool enables you to check the voltage of network cables. You can use a DVM to help you find a break or a short in a network cable.
Time-Domain Reflectometer (TDM). TDMs send sound waves along a cable and look for imperfections that might be caused by a break or a short in the line.
Oscilloscope. This device measures fluctuations in signal voltage and can help find faulty or damaged cabling.

Several diagnostic software tools provide information on virtually any type of network hardware, as well. A considerable number of diagnostic software packages are available at a variety of prices.