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Online Cisco Certification Exam Braindumps
Associated certification:CCIP, CCVP, IP Telephony Design Specialist, IP Telephony Express Specialist, IP Telephony Operations Specialist, and IP Telephony Support Specialist,The QOS exam is one of the qualifying exams for the Cisco Certified Internetwork Professional, Cisco Certified Voice Professional, Cisco IP Telephony Design Specialist, Cisco IP Telephony Express Specialist, Cisco IP Telephony Operations Specialist, and Cisco IP Telephony Support Specialist certifications. The QOS 642-642 exam will test materials covered under the Implementing Cisco Quality of Service QOS v2.1 course. The 642-642 exam will certify that the successful candidate has knowledge and skills necessary to configure and troubleshoot Cisco IOS routers running Quality of Service protocols in Service Provider and Enterprise environments. The 642-642 exam covers topics on IP QOS, classification and marking Mechanisms, queuing mechanisms, traffic shaping and policing mechanisms, congestion avoidance mechanisms, link efficiency mechanisms, modular QOS command line interface, and QOS Best Practices. ????????????????????????????????????????????????????????????????????????????????????642-552?????????????????????????? ??642-564?????????????????????????????????????????????????????????????????????????????????? 642-582???????????????????????????? ??642-587 ?????????????????????????????????????????????????????????????????????????????????? 642-642???????????????????????????? ??642-691 ?????????????????????????????????????????????????????????????????????????????????? 642-825???????????????????????????? ??642-845 This policy-map is applied to a 128-kbps serial interface in the output direction. Which set of additional commands within this policy-map will improve the link efficiency on the serial interface? policy-map test class voice priority 25 class telnet bandwidth remaining percent 20 class ftp bandwidth remaining percent 30 A: class voice no priority 25 bandwidth percent remaining 25
B: class voice compression header ip tcp
C: class telnet compression header ip tcp
D: class telnet fair-queue
E: class ftp fair-queue
F: class ftp compression header ip
Correct Answers:?? C
2.When configuring a Cisco Catalyst switch to accommodate an IP phone with an attached PC, it is desired that the trust boundary be set between the IP phone and the switch. Which two commands on the switch are recommended to set the trust boundary as described? (Choose two.)
A:mls qos trust extend [cos value]
B:no mls qos trust dscp
C:mls qos trust cos
D:mls qos trust device cisco-phone
E:switchport priority extend trust
F:mls qos cos 5
Correct Answers:?? C, D
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