Using the G.729 codec and the default cRTP configuration， what is the approximate VoIP bandwidth savings across a Frame Relay link that adds a 6 byte frame header？"（）

多项选择题Whichtwostatementsabouttheopenandsharedkeywireless-authenticationmethodsaretrue？（）

A. Shared key authentication is considered more secure than open authentication.
B. Shared key authentication is considered less secure than open authentication.
C. If the WEP keys do not match using the open authentication method， the client will not authenticate， associate， and transfer data.
D. If the WEP keys do not match using the open authentication method， the client will still be able to authenticate and associate， but will not transfer data.
E. If the WEP keys do not match using the open authentication method， the client will still be able to authenticate， associate， and transfer data.

多项选择题WhataretwofeaturesofWCSwirelessmanagement？（）

A. centralized management for autonomous access points
B. centralized management for lightweight access points
C. integration with the Location Appliance to expand real time tracking to 1500 devices for 30 days
D. integration with the Location Appliance to expand real time tracking to 2500 devices for 15 days
E. the inclusion of an integrated AAA server
F. an external AAA-server requirement

多项选择题WhataretwofeaturesofWLSE-Expresswirelessmanagement？（）

A. centralized management for autonomous access points
B. centralized management for lightweight access points
C. centralized management that requires an external AAA server
D. centralized management with integrated AAA server
E. integration with the Location Appliance to expand real time tracking to 1500 devices for 30 days
F. integration with the Location Appliance to expand real time tracking to 2500 devices for 30 days

多项选择题Whenarouterconvertsanalogsignalstodigitalsignals，whatthreestepsarealwaysincludedintheprocess？（）

A. involution
B. encoding
C. sampling
D. quantization
E. compression
F. companding

单项选择题Whichstatementistrueaboutthecomparisonofvoicetrafficwithvideotraffic？（）

A. Video conferencing traffic tends to be much more bursty in nature and is more prone to have an impact on other traffic flows.
B. Latency requirements are less stringent for video traffic than for voice traffic.
C. Video traffic is less sensitive to dropped packets than for voice traffic.
D. Video traffic requires the retransmission capabilities of TCP whereas voice uses UDP.
E. Voice traffic tends to be much more bursty in nature and is more prone to have an impact on other traffic flows.
F. Voice traffic requires the retransmission capabilities of TCP whereas video uses UDP.