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 ...

The purpose of this policy is to establish standards for management of network access and communications. This policy applies to all information technology systems that are connected to and use the ...

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 ...

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 ...

If after you run the Incoming Connections Troubleshooter, you receive any error which has a “Network Protocol is missing” message, below is a list of ...

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 ...