单项选择题

Which statement is NOT a key QoS recommended requirement for voice bearer traffic?（）

A.Voice traffic should be marked to DSCP EF per the QoS baseline and RFC3246.
B.Voice traffic loss should be no more than 3%.
C.One-way latency （mouth-to-ear） should be less than 150 msec.
D.Average one way jitter should be targeted to less than 30 msec.
E.21-320 Kbps of guaranteed priority bandwidth is required per call depending on sample rate，codec，and layer 2 overhead.

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多项选择题ForwhichtwoofthesepurposesareCiscoSpectrumExpertused?（）

A.audit VoWLAN cell edge coverage
B.verify RFID tag coverage by four access points at -75 dBm
C.audit microwave oven interference
D.audit 802.11a channel 36 utilization
E.create test scripts for 802.11n bonded channel throughput tests

单项选择题WhatstandardisWMMbasedon?（）

A.802.11e
B.802.11k
C.802.11i
D.802.11h

单项选择题WhichexplanationdescribesawirelessclientIGMPmulticastjoinrequestusingaCiscoUnified WirelessNetworkv5.2architectureofAPtoWLANcontroller?（）

A.passed by the AP to its connected switch and then forwarded directly to the connected router，which creates an MGID table entry
B.passed by the AP to the WLAN controller and then forwarded to the source PIM-enabled router，which creates an MGID table entry
C.passed by the AP to the WLAN controller， which creates an MGID table entry before forwarding to the directly connected PIM-enabled router
D.passed by the AP to its connected switch and then forwarded to the rendezvous point router，which creates an MGID table entry

单项选择题WhatisthepurposeoftheWLCController->Multicast->IGMPTimeoutfeatureoperatingonv5.2?（）

A.to determine if there are more clients that are using the multicast stream
B.to limit the time that a client has to request an IGMP join to the controller multicast group
C.to determine if the multicast router is still alive and responding to multicast clients
D.to remove clients from the multicast group if the multicast traffic exceeds the allotted bandwidth allowed for multicast clients

单项选择题WhichinformationelementwilltheclientuseiftheclientintendstouseadifferentPHYratethanthe nominalPHYrateadvertised?（）

A.TSPEC IE
B.TSRS IE
C.WMM IE
D.TSM IE