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Exam 350-801 topic 1 question 68 discussion

Actual exam question from Cisco's 350-801
Question #: 68
Topic #: 1
[All 350-801 Questions]

To provide high-quality voice and take advantage of the full voice feature set, which two access layer switches provide support? (Choose two.)

  • A. Use multiple egress queues to provide priority queuing of RTP voice packet streams and the ability to classify or reclassify traffic and establish a network trust boundary.
  • B. Deploy RSVP to improve VoIP QoS only where it can have a positive impact on quality and functionality where there is limited bandwidth and frequent network congestion.
  • C. Map audio and video streams of video calls (AF41 and AF42) to a class-based queue with weighted random early detection.
  • D. Use 802.1Q trunking and 802.1p for proper treatment of Layer 2 CoS packet marking on ports with phones connected.
  • E. Implement IP RTP header compression on the serial interface to reduce the bandwidth required per voice call on point-to-point links.
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Suggested Answer: AD 🗳️
Reference:
https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucme/srnd/design/guide/cmesrnd/nstrct.html
by wwisp3422112 at Nov. 29, 2022, 2:39 p.m.

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wwisp3422112
Highly Voted 6 months, 1 week ago
Correct A and D: To provide high-quality voice and to take advantage of the full voice feature set, access layer switches should provide support for: •802.1Q trunking and 802.1p for proper treatment of Layer 2 CoS packet marking on ports with phones connected •Multiple egress queues to provide priority queuing of RTP voice packet streams •The ability to classify or reclassify traffic and establish a network trust boundary •Inline power capability (Although inline power capability is not mandatory, we highly recommend for the access layer switches.) •Layer 3 awareness and the ability to implement QoS access control lists (These features are required if you are using certain IP telephony endpoints, such as a PC running a softphone application, that cannot benefit from an extended trust boundary.)
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