Which of the following are devices into which a wireless LAN PC Card client device can be inserted? (Select all that apply.)
Answer(s): B,D
From the information provided for Wireless LAN client devices in the study guide for the CWNA, PCI and USB adapters are used with wireless LAN PC cards for certain implementations. Therefore, the answer should B, D.
What answer below gives the complete text for the acronym EIRP?
Answer(s): A
The term used for the power radiated by the antenna is Equivalent IsotropicallyRadiated Power (EIRP).
CWNA Official Study Guide, Page 149
Which of the following items are security risks in a wireless LAN? (Select all that apply.)
Answer(s): C,F
It is well known that RF jamming is one of the key security risks associated with Wireless LANs. Also, open access (without any type of security) is clearly a security hazard for wireless LANs and a treat for hackers and the like :) Therefore, the answer should C, F.
What is the name of the method by which a mobile client moves beyond the range of one AP and regains access to the wireless network by roaming to a different AP?
Answer(s): C
Reassociationusually occurs because the wireless station has physically moved away from the original access point, causing the signal to weaken. In other cases, reassociation occurs due to a change in radio characteristics in the building, or due simply to high network traffic on the original access point. In the latter case, this function is known as loadbalancing, since its primary function is to distribute the total wireless LAN load most efficiently across the available wireless infrastructure.
CWNA Official Study Guide, Page 185
Which of the following are possible locations that the MAC address of a wireless LAN access point can be found? (Select all that apply.)
Answer(s): C,E
Since this is not specifically mentioned in the study guide for the CWNA, we are not entirely sure about the answer. However, the study guide does clearly indicate that the MAC is always sent in the clear (without any encryption) with any and all types of wireless frames broadcasted. This includes beacons. Therefore the answer should include E
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