Cisco最新CCNP642-845考题分析

来源:思科认证    发布时间:2012-11-09    思科认证视频    评论

10. Which 802.1x Extensible Authentication Protocol (EAP) type supports authentication using digital certificates?
 A. EAP-TLS
 B. EAP-FAST
 C. LEAP
 D. WPA
Answer: A

11. Which three configuration tasks are required to successfully deploy NBAR to recognize TCP and UDP stateful protocols? (Choose three.)
 A. Over leased lines, use the multilink ppp command to reduce latency and jitter, and to create Distributed Link Fragmentation and interleaving.
 B. Use the service-policy command to attach a traffic flow to an interface on the router.
 C. Use the ip rsvp bandwidth command to set a strict upper limit on the bandwidth NBAR uses, and to guarantee admission of any flows.
 D. Use the policy-map command to define one or more QoS policies (such as shaping, policing, and so on) to apply to traffic defined by a class map.
 E. Use the random-detect dscp command to modify the default minimum and maximum thresholds for the DSCP value.
 F. Use the class-map command to define one or more traffic classes by specifying the criteria by which traffic is classified.
Answer: BDF

12. Which codec standard would provide the highest voice-quality, mean opinion score (MOS)?
 A. G.711, PCM
 B. G.728, LDCELP
 C. G.729, CS-ACELP
 D. G.729A, CS-ACELP
Answer: A

13. Which two voice-gateway, analog-interface statements are true? (Choose two.)
 A. A router can use a Foreign Exchange Office (FXO) interface to connect to a PSTN.
 B. A router can use a Foreign Exchange Station (FXS) interface to connect to a PBX.
 C. An analog fax machine can connect to a Foreign Exchange Office (FXO) interface.
 D. An analog telephone can connect to a Foreign Exchange Station (FXS) interface.
Answer: AD

14. Refer to the exhibit. Both routers have been configured as VoIP gateways. They must also support traditional telephony devices to connect to analog telephones. Which two configuration changes would correctly support the voice requirements? (Choose two.) 
 
 A. On each router, under the dial-peer voice 1 pots configuration, add the port fa0/0 command.
 B. On each router, under the dial-peer voice 1 pots configuration, add the port 1/0/0 command.
 C. On each router, configure dial-peer voice 1 as a voip connection and configure dial-peer voice 2 as a pots connection.
 D. Under the dial-peer voice 1 pots configuration, change the destination pattern of 1111 to 2222 on the R1 router, and 2222 to 1111 on the R2 router.
 E. Under the dial-peer voice 2 voip configuration, change the destination pattern of 1111 to 2222 on the R1 router, and 2222 to 1111 on the R2 router.
 F. Under the dial-peer voice 2 voip configuration, change the destination target address of 10.2.2.2 to 10.1.1.1 on the R1 router, and the destination target address of 10.1.1.1 to 10.2.2.2 on the R2 router.
Answer: BE

15. Drag each WLSE feature on the left to its benefit on the right.

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