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210-060 · Question #201

Which two choices best describe call signaling and media flows? (Choose two.)

The correct answer is A. a process used to connect two parties calling B. audio or video or both transferred between two parties during conversation. Call signaling is the process of establishing a connection between two parties, while media flow is the actual audio or video exchanged once that connection is established.

Call Control

Question

Which two choices best describe call signaling and media flows? (Choose two.)

Options

  • Aa process used to connect two parties calling
  • Baudio or video or both transferred between two parties during conversation
  • Cprotocol for end-to-end users
  • Da flow of audio and instant messaging
  • Eall call control signals being delivered through a channel
  • Fdata telephony, over a data network such as the Internet

How the community answered

(45 responses)
  • A
    89% (40)
  • C
    2% (1)
  • D
    7% (3)
  • F
    2% (1)

Why each option

Call signaling is the process of establishing a connection between two parties, while media flow is the actual audio or video exchanged once that connection is established.

Aa process used to connect two parties callingCorrect

Call signaling uses protocols such as SIP or H.323 to establish, manage, and tear down a call session between two endpoints, negotiating parameters before any media is exchanged.

Baudio or video or both transferred between two parties during conversationCorrect

Media flow is the real-time transmission of audio, video, or both between the communicating parties, typically carried over RTP (Real-time Transport Protocol) after signaling has completed session setup.

Cprotocol for end-to-end users

This describes a general network protocol characteristic and does not specifically define either call signaling or media flow.

Da flow of audio and instant messaging

Media flow in VoIP refers to audio and video streams, not instant messaging; instant messaging uses separate protocols such as XMPP and is not part of a call media stream.

Eall call control signals being delivered through a channel

This partially describes only the control-signal aspect of call signaling and ignores the media flow component entirely.

Fdata telephony, over a data network such as the Internet

Data telephony over the Internet describes VoIP as a broad technology category, not the specific concepts of call signaling or media flow.

Concept tested: VoIP call signaling versus media flow distinction

Source: https://www.cisco.com/c/en/us/support/docs/voice/voice-quality/14081-voip-fund.html

Topics

#call signaling#media flow#VoIP fundamentals#RTP

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