TCP/IP is a set of proposals developed to allow co-operating computers to share resources across a network. Some of the largest networks today are built on the TCP/IP protocol suite. This manual discusses how to prevent, detect, troubleshoot and correct TCP/IP network problems. By using products such as distributed sniffers, field metering tools and protocol analyses, network managers can learn a lot about what is going on in (or wrong in) an internetwork and be able to troubleshoot a live TCP/IP network. This book focuses specifically on identifying problem areas, including identifying and correcting protocol errors, DNS route problems, application faults and slow response times.