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Exam 210-060 topic 1 question 11 discussion

Actual exam question from Cisco's 210-060
Question #: 11
Topic #: 1
[All 210-060 Questions]

A network engineer receives a report about poor quality on an active call between the IP phone of user A over the WAN to the IP phone of user B. Using web access to the phone, the network engineer remotely checks call statistics such as jitter, network delay, and packet loss. Calculated packet loss is 3%, average jitter is 20 ms, network delay is 1 ms, and conceal seconds is 7.

What is the most likely problem with this call?

  • A. Calculated packet loss is too high.
  • B. Average jitter is too high.
  • C. Network delay is too high.
  • D. Conceal seconds are too high.
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Suggested Answer: A 🗳️
by skhanfar at Feb. 20, 2020, 9:24 p.m.

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skhanfar
5 years, 2 months ago
Voice calls, either one-to-one or on a conference connection capability, require the following: ✑ ≤ 150 ms of one-way latency from mouth to ear (per the ITU G.114 standard) ✑ ≤ 30 ms jitter ✑ ≤ 1 percent packet loss ✑ 17 to 106 kbps of guaranteed priority bandwidth per call (depending on the sampling rate, codec, and Layer 2 overhead) ✑ 150 bps (plus Layer 2 overhead) per phone of guaranteed bandwidth for voice control traffic Reference: http://www.ciscopress.com/articles/article.asp?p=471096&seqNum=6
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