642-742 무료 덤프문제 온라인 액세스

When a Vocera badge performs a broadcast call in a properly configured VoWLAN using WLC v7.0, which two choices indicate how the QoS is marked? (Choose two.)

• A.Upstream marked as DSCP EF.
• B.Downstream marked as DSCP EF.
• C.Upstream marked as Best Effort.
• D.Downstream marked as Silver.
• E.Upstream marked as ToS CS4.
• F.Downstream marked as Best Effort.

An engineer has fired up a packet capture to try to determine if there are malformed frames being transmitted. They notice that there is a station transmitting frames consecutively without giving other stations a chance to transmit. What capability is the engineer witnessing?

• A.802.11e priority contention window
• B.Extended Interframe Space
• C.802.11 fragment burst
• D.Aggregated MPDU

Which four statements describe attributes of interactive video? (Choose four.)

• A.Packet loss is limited to 1 percent.
• B.One-way latency is limited to a few seconds.
• C.Jitter has no significant requirements.
• D.One-way latency is limited to 150 ms.
• E.Packet loss is limited to 5 percent.
• F.QoS marking is at AF41.
• G.Jitter is limited to 30 ms.
• H.QoS marking is at CS4.

Which statement describes the benefit of WMM U-APSD over legacy 802.11 power-save mode?

• A.Client no longer sends null frame to notify of sleep mode.
• B.Client sleep mode is scheduled by AP to reduce jitter.
• C.Client can burst data without standard interframe spacing.
• D.Client can burst data without ACKs.

After implementing 802.11n SGI in a noisy environment increased interference is noted, at what level would the interference be introduced by the change?

• A.packets
• B.headers
• C.ACKs
• D.symbols