Getting a handle on the invisible part of your network—the protocols that are in use—can be of enormous value in helping you detect problems. So far, we've talked about the tangibles of your ...

As a younger person, I thought I knew everything — especially about what appeared to be simple technical topics. But as the old adage goes, the older I get, the less I understand. This month we will ...

Do we really need new network protocols? The short answer is yes. Sure, the existing set of network protocols have worked surprisingly well, and attempts at improving them have frequently resulted in ...

Last time, one of our readers challenged VoIP market leaders Cisco, Nortel and Avaya on their commitment to open standard, cost-effective VoIP solutions. Today, we’d like to add our observations and ...

This excerpt is from CCIE Voice Exam Quick Reference Sheets (Digital Short Cut), by Mark Lewis and published by Cisco Press. ISBN-10: 1-58705-333-0 Read Mark Lewis’ blog for Cisco Subnet here. More ...

Computer engineers learn early on that a core set of protocols are critical to networks. Some of the most important protocols include Internet Protocol (IP), Transaction Control Protocol (TCP), ...