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

By David D. Coleman

Up to date variation of this top–selling CWNA research advisor Sybex is the legit writer for CWNP, Inc., the association in the back of the the CWNA certification. the recent version of Sybex′s top–selling CWNA learn advisor covers the newest 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 lots more and plenty extra. This certain booklet not just covers all examination goals, it is usually sensible bankruptcy evaluate questions and hands–on routines. The book′s site deals extra perform assessments and flashcards, demo software program, and extra. Prepares you for examination PW0–105, the recent CWNA examination administered by way of the qualified instant community specialist, Inc. Covers all examination ambitions, together with radio frequency (RF) applied sciences and IEEE 802.11 rules and criteria, protocols and units, community implementation, community protection, and RF web site surveying comprises sensible examples and overview inquiries to make stronger studying Discusses the newest info on instant tendencies, protocols, and standards––helpful even if you′re getting ready for the examination or no longer offers extra perform assessments, digital flashcards, demo software program, and extra from the book′s accompanying web site CWNA certification is the root for any specialist who makes use of instant networks––and a springboard to extra complicated instant certifications. start this day with this particular CWNA prep consultant.

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500 mW What are some possible effects of voltage standing wave ratio (VSWR)? ) A. Increased amplitude B. indd xlviii Decreased signal strength 4/10/2012 4:28:15 PM Assessment Test 7. C. Transmitter failure D. Erratic amplitude E. Out-of-phase signals xlix When installing a higher-gain omnidirectional antenna, which of the following occurs? ) A. The horizontal coverage increases. 8. B. The horizontal coverage decreases. C. The vertical coverage increases. D. The vertical coverage decreases. 11 radios?

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.

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. For more information, see Chapter 12. 25. E. Although you can hide your SSID to cloak the identity of your wireless network from script kiddies and nonhackers, it should be clearly understood that SSID cloaking is by no means an end-all wireless security solution.

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