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Jeremy Cioara and Michael Valentine’s CCNA Voice 640-461 Official Cert Guide, published by Pearson Education, helps you learn, prepare, and practice for success in the certification exam. It helps you master CCNA Voice 640-461 exam topics and assesses your knowledge with chapter-opening quizzes. Review key concepts with exam preparation tasks are included. Students can now practice with realistic exam questions on the CD-ROM that comes along with this title. Other key features of the book are as follows: 80% new content, reflecting the exam's expansion to cover Cisco Unified Communications Manager (CUCM), CUCM Express, Unity Connection, Unified Presence, and network infrastructure; extensive, proven features to help students review efficiently and remember the most important details; and official, comprehensive assessment, review, and practice guide for Cisco's latest CCNA Voice exam direct from Cisco.

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Pearson Education has been publishing books of all genres, including science, technology, law, business, humanities and others, and has been educating more than a hundred million people across the world. Some of the books published by Pearson are Decision Support and Business Intelligence systems, Electromagnetic Field Theory, Computer Architecture and Organization, Managing Business Process Flows, and A Critical Companion to Compulsory English.