Download CWNA: Certified Wireless Network Administrator Official by David D. Coleman PDF

By David D. Coleman

ISBN-10: 111812779X

ISBN-13: 9781118127797

Up-to-date variation of this top–selling CWNA learn consultant Sybex is the reliable writer for CWNP, Inc., the association at the back of the the CWNA certification. the recent version of Sybex′s top–selling CWNA learn consultant covers the most recent CWNA examination, PW0–105. If you′re getting ready for the examination, you′ll locate complete assurance of radio frequency (RF) applied sciences, in addition to IEEE 802.11 rules and criteria, protocols and units, community safeguard, and masses extra. This targeted e-book not just covers all examination pursuits, it's also sensible bankruptcy assessment questions and hands–on workouts. The book′s web site bargains extra perform tests and flashcards, demo software program, and extra. Prepares you for examination PW0–105, the hot CWNA examination administered via the qualified instant community expert, Inc. Covers all examination goals, together with radio frequency (RF) applied sciences and IEEE 802.11 rules and criteria, protocols and units, community implementation, community safeguard, and RF web site surveying contains sensible examples and assessment inquiries to toughen studying Discusses the newest details on instant tendencies, protocols, and standards––helpful no matter if you′re getting ready for the examination or now not presents extra perform checks, digital flashcards, demo software program, and extra from the book′s accompanying site CWNA certification is the root for any expert who makes use of instant networks––and a springboard to extra complex instant certifications. start this present day with this particular CWNA prep consultant.

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Additional resources for CWNA: Certified Wireless Network Administrator Official Study Guide: Exam PW0-105

Example text

Traffic indication map (TIM) E. Vendor proprietary information F. Time stamp G. Spread spectrum parameter sets 16. Anthony Dean was hired to perform a wireless packet analysis of your network. While performing the analysis, he noticed that many of the data frames were preceded by an RTS frame followed by a CTS frame. What could cause this phenomenon to occur? ) A. Because of high RF noise levels, some of the stations have automatically enabled RTS/ CTS. indd l B. Some stations were manually configured for RTS/CTS.

27. C, D. Although the layer 2 wireless intrusion detection and prevention products might be able to detect some RF jamming attacks, the only tool that will absolutely identify an interfering signal is a spectrum analyzer. A spectrum analyzer is a frequency domain tool that can detect any RF signal in the frequency range that is being scanned. Layer 1 distributed spectrum analysis is now available in some WIPS enterprise solutions. For more information, see Chapter 14. 28. A, B, C, D, E. 11 wireless intrusion detection systems may be able to monitor for as many as 100 or more attacks.

Collisions will corrupt the frames and they will need to be retransmitted. Anytime retransmissions are necessary, more overhead is added to the medium, resulting in decreased throughput. Intersymbol interference is a result of multipath and not the hidden node problem. For more information, see Chapter 12. 24. A, B. Layer 2 retransmissions can be caused by many different variables in a WLAN environment. Multipath, mismatched client and AP transmission power, RF interference, hidden nodes, adjacent cell interference and low signal-to-noise ratio (SNR) are all possible causes of layer 2 retransmissions.

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