Jerome Henry - CCNP Wireless (642-742 IUWVN) Quick Reference

Jerome Henry

ciscopress.com

CCNP Wireless (642-742 IUWVN) Quick Reference

Jerome Henry

Copyright 2012 Cisco Systems, Inc.

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First Release May 2012

ISBN-10: 1-58714-311-9
ISBN-13: 978-1-58714-311-3

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Jerome Henry is technical leader at Fast Lane. Jerome has more than 10 years of experience teaching technical Cisco courses in more than 15 countries and in 4 different languages, to audiences ranging from Bachelor degree students, to networking professionals, to Cisco internal system engineers. Jerome joined Fast Lane in 2006. Before this, he consulted and taught Heterogeneous Networks and Wireless Integration with the European Airespace team, which was later acquired by Cisco and became its main wireless solution. He is a Certified Wireless Networking Expert (CWNE #45), CCIE Wireless (#24750), and CCNP Wireless, and has developed several Cisco courses focusing on wireless topics, including CUWSS, IAUWS, IUWNE, IUWMS, IUWVN, CWLBS, and the CWMN lab guide. With more than 20 IT industry certifications and more than 10,000 hours in the classroom, Jerome was awarded the IT Training Award Best Instructor silver medal in 2009. He is based in Cary, North Carolina.

Denise Papier is senior technical instructor at Fast Lane. Denise has more than 11 years of experience teaching technical Cisco courses in more than 15 different countries, to audiences ranging from Bachelor degree students to networking professionals and Cisco internal system engineers. Focusing on her wireless experience, Denise joined Fast Lane in 2004. Before that, she was teaching the Cisco Academy Program and lecturing BSc (Hons) Information Security at various universities. She is CCNP Wireless and developed several Cisco courses focusing on wireless topics (IUWNE, IAUWS, ACS, ISE, lab guides, and so on). With more than 15 IT industry certifications (from Cisco CCNP R & S, CCIP to Microsoft Certified System Engineer and Security Specialist, CICSP - Cisco IronPort Certified Security Professional) and more than 5000 hours in the classroom, Denise is a fellow member of the Learning and Performance Institute (LPI). She is based in the United Kingdom.

Quality of service (QoS) for wireless applications is an important topic because it can lead, if misunderstood, to many structural mistakes in wireless networks deployments and poor quality when QoS-dependent devices (for example, VoIP phones) are added. Expect to be tested extensively on this topic on the IUWVN exam. Make sure to understand the concepts and their related configuration.

QoS is described as a tool for network convergence (that is, the efficient coexistence of VoIP, video, and data in the same network). QoS does not replace bandwidth, but provides a means to ensure that all traffic gets the best treatment (adapted to each traffic type) in times of network congestion. QoS can be implemented in three different ways: