1. Which two QoS fields should be used by R1 and R2 to classify the traffic sent from PC1 to Server1? (Choose two.)

　　A. CoS

　　B. IP DSCP

　　C. DE bit

　　D. priority bits

　　E. IP precedence

　　Answer: BE

　　2. Which classification tool can be used to classify traffic based on the HTTP URL?

　　A. class-based policing

　　B. policy-based routing (PBR)

　　C. committed access rate (CAR)

　　D. network-based application recognition (NBAR)

　　E. dial peers

　　Answer: D

　　3. Which two statements are true about the function of CAC? (Choose two.)

　　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.

　　Answer: BD

　　4. Which two statements are true about the implementation of QoS? (Choose two.)

　　A. Implementing DiffServ involves the configuration of RSVP.