CCNA Voice 640-461 Official Cert Guide

Jeremy D. Cioara, CCIE No. 11727, works in many facets of the Cisco networking realm. As an author, he has written multiple books for Cisco Press and Exam Cram. As an instructor, he teaches at Interface Technical Training (www.interfacett.com) in Phoenix, Arizona. Likewise, Jeremy has recorded many E-Learning titles at CBTNuggets (www.cbtnuggets.com). Finally, Jeremy is the CIO of AdTEC Networks and works as a network consultant, focusing on Cisco network and VoIP implementations. Jeremy also casually blogs about Cisco topics at Tekcert (www.tekcert.com) in his free time. Thankfully, he is married to the Certified Best Wife in the World (CBWW), who helps him manage his time and priorities and prevents him from getting an enormous Cisco logo tattooed across his chest. Michael Valentine has 15 years of experience in the IT field, specializing in network design and installation. Currently, he is a Cisco trainer with Skyline Advanced Technology Services and specializes in Cisco Unified Communications, CCNA, and CCNP classes. His accessible, humorous, and effective teaching style has demystified Cisco for hundreds of students since he began teaching in 2002. Mike holds a Bachelor of Arts degree from the University of British Columbia and currently holds CCNA, CCDA, CCNP, CCVP, and CCSI No. 31461 certifications. Mike has developed courseware and labs for Cisco and its training partners. Mike is the coauthor of CCNA Exam Cram (Exam 640-802), Third Edition (Que 2008), authored the CCNA Voice Quick Reference Guide, and has served as technical editor and contributor on several Cisco Press titles.