Exam 300-070 topic 1 question 117 discussion

Actual exam question from Cisco's 300-070

Question #: 117
Topic #: 1

Refer to the exhibit.

An engineer is troubleshooting a codec negotiation issue where both endpoints that are involved in the call support the codecs listed in the exhibit. Which audio codec is selected if a call between two endpoints in Region 1 is placed?

A. G722
B. G729
C. G711a
D. G711u A

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Suggested Answer: Explanation 🗳️

by Laurorita at Feb. 12, 2020, 11:25 a.m.

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zzamchoi

2 years, 9 months ago

This question is a bit tricky. According to the codec list, it is absolutely G722 (48k). However, according to cisco documentation (https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/admin/10_0_1/ccmcfg/CUCM_BK_C95ABA82_00_admin-guide-100/CUCM_BK_C95ABA82_00_admin-guide-100_chapter_01000.html) +++++++++++++ - The maximum audio bit rate determines the codecs that are allowed for calls by filtering out codecs with bit rates that exceed the specified limit. - The maximum video call bit rate comprises the sum of the audio and video bit rates, but does not include transport overhead. ++++++++++++++++ It mentioned video call exclude overhead, but it does not mentioned "exclude overhead" on audio call. If we count the overhead, G722 will be 87.2k, G729 will be 31.2k. Therefore, B will be the answer

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Laurorita

5 years, 2 months ago

answer is A

upvoted 2 times

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Exam 300-070 topic 1 question 117 discussion

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zzamchoi

Laurorita

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