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Q.

. The original IEEE 802.11, uses _________

A

FHSS

B

DSSS

C

OFDM

D

either (a) or (b)

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SDH has defined a hierarchy of signals called ________.

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STSs

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either (a) or (b)

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The _______ layer corresponds to the physical layer of the OSI model

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In Frame Relay, an address can be ________ bytes

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. In _______ methods, a station cannot send unless it has been authorized by other stations.

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