COMPUTER NETWORKING

WIRELESS NETWORKS AND MOBILE IP

WIRELESS NETWORKS

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Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]

Which signaling method uses a narrow frequency band and hops data signals in a predictable sequence?

A	FHSS
B	DSSS
C	OFDM
D	CDMA

Explanation:

Detailed explanation-1: -FHSS requires the use of narrowband signals that change frequencies in a predictable pattern. The term frequency hopping refers to data signals hopping between narrow channels. For example, consider the 2.4GHz frequency band used by 802.11b/g.

Detailed explanation-2: -Adaptive frequency-hopping spread spectrum (AFH) AFH is used in Bluetooth wireless technology to improve resistance to radio frequency interference by circumventing high-traffic frequencies in the hopping sequence.

Detailed explanation-3: -802.11 standards use the Ethernet protocol and CSMA/CA (carrier sense multiple access with collision avoidance) for path sharing.

Detailed explanation-4: -Which type of communication path-sharing technology do all 802.11 standards for wireless networking support? 802.11x standards for wireless networking all support the CSMA/CA (Carrier Sense Multiple Access/Collision Avoidance) type of communication path-sharing technology.

There is 1 question to complete.