Howard Berkowitz explains why load balancing, on a per-hop basis, is a very limited solution to overall congestion management. He also reviews some legitimate applications for load balancing.

View Load Balancing A Tutorial excerpt from Managing Performance and QoS II: Other Means of IP QoS Control by Howard C. Berkowitz

CCNA Candidates must understand ISDN. In addition to helping you achieve a passing score on the CCNA exam, learning ISDN will give you a foundation for further progress in your internetworking knowledge and career.

View ISDN Basics A Tutorial excerpt from ISDN and DDR by David Wolsefer

Did you know the brand new "Other VPNs" Study Guide that Certification Zone unveiled on July 1 is the seventh Zone Study Guide written by networking expert Annlee Hines? Gain a better understanding of Annlee by reading this week's Zone Interview. In it, Annlee discusses the different real-life scenarios that make it necessary to understand VPNs and also offers some nuts and bolts advice about security, consulting, and networking in general.

View Interview with the Author - Annlee Hines