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多項選擇題

Which three are interframe spaces defined in 802.11?（）

A.SIFS
B.PIFS
C.DIFS
D.LIFS
E.NAV
F.CWmin

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單項選擇題

What is the payload size of a wireless IP phone in a call using G.711 codec?（）

A.20 bytes
B.60 bytes
C.120 bytes
D.160 bytes

單項選擇題

What call performance statistics are reported on the Cisco Wireless IP Phone 7921 user interface?（）

A.minimum jitter
B.maximum jitter
C.upstream standard packet deviation
D.average MOS value
E.average conceal rate

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