GSEC: GIAC Security EssentialsDemo

By GIAC · Question Mode

QuestionQ28

Networking & Protocols

Which of the following SIP INVITE lines identifies to the remote registrar the VoIP phone that originated the call?

  • A Via
  • B To
  • C From-Agent
  • D User-Agent
Explanation

The SIP User-Agent header contains information about the user agent client (UAC) originating a request, allowing the receiving system to identify the initiating VoIP phone or its software. Via records the signaling path, To identifies the target, and From represents the initiator’s logical identity.

Learn more

Community Discussion

No comments yet. Be the first to start the discussion!