單項(xiàng)選擇題When using simultaneous voice and multicast on a single WLAN and RF band, what is the recommended DTIM value of the WLAN for VoWLAN devices?()

A.DTIM = 1
B.DTIM = 2
C.DTIM = 3
D.DTIM = 4


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2.多項(xiàng)選擇題Which three are interframe spaces defined in 802.11?()

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

3.單項(xiàng)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

4.單項(xiàng)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

5.單項(xiàng)選擇題Which statement describes the call behavior of the Cisco Unified Wireless IP Phone 7921G when it roams from 802.11b to 802.11a?()

A.The phone does a directed call hangup on 802.11b,then does an auto-redial on 802.11a,creating a  new call.
B.The phone does a directed call hangup on 802.11b, then the user does a redial on 802.11a,creating a  new call.
C.The phone does a disassociation on 802.11b and an association on 802.11a,and call remains up if the  subnet has not changed.
D.The phone does not roam from 802.11b to 802.11a when on an active call.
E.The phone must switch network profiles to roam from 802.11b to 802.11a.

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