多项选择题
A.link efficiency
B.admission control
C.classification and marking
D.shaping and policing
E.congestion avoidance using the RTP protocol
F.resource reservation using the RSVP protocol
多项选择题 Ciscoprovidestwoenhancementsto802.11securitywhichprotectaWEPkeyfromexploits.Whichtwotechnologiesprovidethesesecurityenhancements？（）
单项选择题 Refer to the exhibit. The network has been configured with H.323 gateways and gatekeepers as shown. Which statement is true when a call is placed？（）
多项选择题 WhatarethreeCiscoUnifiedCallManagerfeatures？（）