You become the IT Director of Management Consulting Company who must explain to the Vice President the pros and cons of switching over to a VoIP telephone system.

After you've completed the scenario, e-mail: [email protected] for the solution to find out if you had the most appropriate solution.

View Designing Advanced Telephony Solutions A Lab Scenario excerpt from Introduction to Telephony by Annlee Hines

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

View Dial-on-Demand Routing 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