Summary
Your intranet operates pretty much the same as the Internet at large—just on a smaller scale. Accordingly, troubleshooting strategies that work on one will also work on the other.
After you’re done establishing basic layer 1-3 connectivity, you’ll want to focus on infrastructure like DHCP, DNS, and the like. Moving on, you’ll establish basic TCP reachability by using Telnet to service ports. Applications like Web servers and databases require the same kinds of resources and maintenance (such as patching) that all other applications do.
Part of getting ready to troubleshoot your Internet connection is identifying what type of Internet connection you have. After you’ve done so, you’ll want to practice troubleshooting measures using nslookup ...
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