Cisco 400-051 Exam

When a SIP message does not contain the “Allow” header, what is the sender telling the receiver about supported SIP methods?

  • A. The sender does not support any SIP method
  • B. It is coming from an intermediate SIP entry
  • C. The sender supports all standard based SIP methods
  • D. The sender is not providing any information on what method it supports
Answer: Option D.
Explanation: 
No answer description available for this question

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