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Exam 300-820 topic 1 question 54 discussion

Actual exam question from Cisco's 300-820
Question #: 54
Topic #: 1
[All 300-820 Questions]

What it is the purpose of using ICE for Mobile and Remote Access endpoints in the Cisco Collaboration infrastructure?

  • A. ICE controls the bandwidth usage for Cisco Collaboration endpoints if the endpoints are located outside the company network.
  • B. ICE enables Cisco Collaboration endpoints to determine if there is direct connectivity between them.
  • C. ICE uses FAST updates to optimize the video quality in case of packet loss. This technology is available only from Cisco Unified CM version 11.5 and later.
  • D. ICE enablement allows for the Cisco Collaboration endpoint to register through Expressway servers to Cisco Unified Communications Manager behind a firewall.
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Suggested Answer: B 🗳️
by khader09 at Oct. 12, 2020, 1:58 p.m.

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Collabinski
11 months, 2 weeks ago
Selected Answer: B
Interactive Connectivity Establishment (ICE), defined in RFC 8445, is a protocol that combines STUN and TURN. Using ICE, endpoints can determine if there is direct connectivity between them and will then apply the STUN hole-punching techniques to keep the firewall ports opened, thus allowing for both inbound and outbound media traffic. If direct media connectivity cannot be achieved, the endpoints will fall back to the TURN server and will send their UDP traffic centrally instead of going peer-to-peer. https://www.cisco.com/c/en/us/td/docs/solutions/PA/ICE/icepa125.html
upvoted 1 times
Ernisa
10 months, 2 weeks ago
Correct, except that ICE is not a protocol, it is a framework, a technique or a mechanism.
upvoted 1 times
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Mark03
2 years, 11 months ago
Answer is B https://www.cisco.com/c/en/us/td/docs/solutions/PA/ICE/icepa125.html
upvoted 3 times
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khader09
3 years, 2 months ago
The following ICE-capable endpoints can send media directly to each other when they are MRA-registered and ICE passthrough is enabled:
upvoted 3 times
khader09
3 years, 2 months ago
B is correct
upvoted 3 times
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C (25%)
B (20%)
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