The 802.11a standard specifies what number of non-overlapping channels across all 5 GHz UNII bands combined?
Answer(s): B
According to the study guide, each of the 3 bands in the 5 GHz UNII band (lower, middle, upper) contain 4 non-overlapping channels. The question ask the number of such channels "combined". That would be B (12)
HomeRF is more secure than 802.11b because?
Answer(s): A
Certified Wireless Network Administrator Study Guide, page 164
Which of the following questions is important to ask BEFORE performing an RF site survey?
Answer(s): A,C
Certified Wireless Network Administrator Study Guide, page 311
In relation to the 802.11 series of standards, which of the following best describes Direct Sequence Spread Spectrum (DSSS)? Select two.
Answer(s): A,B
service set identifier (SSID) is a unique, case sensitive, alphanumeric value from 2-32 characters long used by wireless LANs as a network name. This naming handle is used for segmenting networks, as a rudimentary security measure, and in the process of joining a network. The SSID value is sent in beacons, probe requests, probe responses, and other types of frames. A client station must be configured for the correct SSID in order to join a network. The administrator configures the SSID (sometimes called the ESSID) in each access point.Some stations have the ability to use any SSID value instead of only one manually specified by the administrator. If clients are to roam seamlessly among a group of access points, the clients and all access points must be configured with matching SSIDs. The most important point about an SSID is that it must match EXACTLY between access points and clients.There are two kinds of scanning: passive scanning and active scanning. In finding an access point, client stations follow a trail of breadcrumbs left by the access point. These breadcrumbs are called service set identifiers (SSID) and beacons. These tools serve as a means for a client station to find any and all access points.
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