A.Gatekeeper multizone
B.Call Admission Control （CAC）
C.Automatic Alternate Routing （AAR）
D.Survivable Remote Site Telephony （SRST）
E.Cisco Unified CallManager Express （CME）

A.the WCS Base version includes all the features of the WCS Location version as well as additional enhancements
B.the WCS Base version provides on-demand location of rogue access points and clients to within 33 feet （10 meters）
C.WCS adds a graphical view of multiple Cisco Wireless LAN controllers and managed access points
D.WCS includes a network management tool which is similar to a site survey tool
E.WCS uses the CDP protocol to communicate with the controllers

A.RSVP that signals QoS requests per individual flow
B.not scalable to large implementations
C.admission control not supported
D.use of dynamic port numbers 
E.UDP not supported

A.the time it takes for a Layer 3 switch or a router to switch a packet from an inbound interface to the queue of the outbound interface
B.the time it takes for a propagate from source to destination
C.the time it takes to place a frame on the physical medium for transport
D.the time a packet resides in the outbound queue of a router

A.delay sensitive packets are given preferential treatment
B.the default policy identifies a delay sensitive class and default class
C.the default policy identifies a delay sensitive class， best effort class， and default class
D.the model is highly scalable
E.the model is still predominant on the internet F the model provides guaranteed service