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Exam 300-815 topic 1 question 61 discussion

Actual exam question from Cisco's 300-815
Question #: 61
Topic #: 1
[All 300-815 Questions]



Refer to the exhibit. While troubleshooting call failures on the Cisco Unified Border Element, an administrator notices that messages are being sent to the service provide, but there is no response. The administrator later learns that this SIP provider does not support PRACK. Which header should be removed from the SIP message to resolve this issue?

  • A. Require: 100rel
  • B. Content-Type: application/sdp
  • C. Contact:
  • D. Content-Disposition: session;handling=required
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Suggested Answer: A 🗳️
by MaxG at Aug. 17, 2023, 2:19 p.m.

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MaxG
9 months, 3 weeks ago
Selected Answer: A
The 100rel is a SIP option tag used to indicate support for reliability of provisional responses. The CSP supports 100rel in the following headers: - Supported - Required https://www.dialogic.com/webhelp/csp1010/8.4.1_ipn3/sip_software_chap_-_prack_support.htm
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