Less obvious causes of network problems are those that degrade network performance. If the network is having problems, you can run a series of software checks to diagnose and fix basic problems. For example, you can use the ping command to quantify problems, such as the loss of packets by a system. Or, you can use the netstat command to display routing tables and protocol statistics. For more information about the various methods that you can use to troubleshoot these types of networking problems, see Resources for Monitoring and Detecting Problems on a TCP/IP Network.
For information about performing network diagnostics by using the network monitor utility, see Performing Network Diagnostics With the network-monitor Transport Module Utility.
Third-party network diagnostic programs also provide a number of tools for troubleshooting network issues. Refer to the third-party product documentation for specifics.