QUESTION: 229

In a FHSS system, what mechanism is used to maintain hopping synchronization in a Basic Service Set?

RTS/CTS
Beacon frames
PCF
Clocking signal

Answer(s): B

An RF signal of 2 Watts is applied to a 100-foot antenna cable, however, only 1 Watt of transmit power is actually developed at the input of the transmitting antenna. What is the resulting cable loss, measured in decibels (dB)?

0.5 dB
1 dB
3 dB
5 dB

Answer(s): C

Reveal Solution Next Question

QUESTION: 231

Which of the following describe differences in the encryption techniques of HomeRF and 802.11b?

HomeRF uses DSSS and 802.11b uses FHSS technology.
HomeRF uses wideband FHSS whereas 802.11b uses narrowband FHSS.
The Initialization Vector (IV) of 802.11b is 24-bit, whereas the IV of HomeRF is 32-bit.
HomeRF specifies how IVs are chosen, how IVs are chosen in the 802.11b is not specified.

Answer(s): C,D

Explanation:

According to the study guide (chapter 6, page 227), HomeRF uses a 32-bit IV and also specifies how IVs should be chosen. Conversely, 802.11 uses a 24 bit IV and does not specify how the IV is selected. Therefore, the answer should be C, D.