Typical TCP/IP Troubleshooting
The applications that make an intranet run are similar in nature to the applications that you’ll run on the Internet, so you can apply the techniques discussed in the following sections to your Internet servers as well. Here’s a good rule of thumb: The Internet is your intranet writ large.
It goes without saying, but I’ll say it anyway: Do not start troubleshooting at a TCP/IP level (layer 3 of the OSI model) until you have verified that layer 1 (physical) and layer 2 (data link) are okay. There’s no sense in chasing after a TCP/IP problem if your connectivity problem has been caused by your Ethernet switch blowing a fuse! (See Hour 17, “Where Do You Start?” for more info on problem triage, including basic TCP/IP ...
Get Sams Teach Yourself Network Troubleshooting in 24 Hours, Second Edition now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.
