多项选择题
Which three statements about end-to-end delay are true？ （）
A. End-to-end delay is the sum of propagation delays， processing delays， serialization delays， and queuing delays.
B. Coast-to-coast end-to-end delay over an optical link is about 20 ms.
C. Processing delay depends on various factors， which include CPU speed， CPU utilization， IP switching mode， and router architecture.
D. Propagation and serialization delays are related to the media.
E. Propagation delay is the time it takes to transmit a packet and is measured in bits-per-second （bps）.
F. Serialization delay is the time it takes for a router to take the packet from an input interface and put it into the output queue of the output interface.
相关考题
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多项选择题
WhichtwostatementsaretrueabouttheimplementationofQoS？（）
A. Implementing DiffServ involves the configuration of RSVP.
B. Implementing IntServ allows QoS to be performed by configuring only the ingress and egress devices.
C. Implementing IntServ involves the utilization of RSVP.
D. Traffic should be classified and marked by the core network devices.
E. Traffic should be classified and marked as close to the edge of the network as possible. -
多项选择题
WhichtwostatementsaretrueaboutthefunctionofCAC？（）
A. CAC provides guaranteed voice quality on a link.
B. CAC artificially limits the number of concurrent voice calls.
C. CAC is used to control the amount of bandwidth that is taken by a call on a link.
D. CAC prevents oversubscription of WAN resources that is caused by too much voice traffic.
E. CAC allows an unlimited number of voice calls while severely restricting， if necessary， other forms of traffic.
F. CAC solves voice congestion problems by using QoS to give priority to UDP traffic. -
多项选择题
WhichtwostatementsregardingtheWirelessLANSolutionEngine（WLSE）aretrue？（）
A. To support fault and policy reporting， the WLSE requires a Wireless Control System （WCS）.
B. When WLSE detects an AP failure， it automatically increases the power and cell coverage of nearby APs.
C. WLSE requires the 2700 location appliance to offer location tracking.
D. WLSE can locate rogue APs and automatically shut them down.
E. WLSE configuration is done using the command line interface （CLI） or a WEB based template.
