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Exam 350-801 topic 1 question 381 discussion

Actual exam question from Cisco's 350-801
Question #: 381
Topic #: 1
[All 350-801 Questions]

SIP proxies have operations defined in RFC 3261 and supporting extensions. Though no IETF RFC completely defines how SBCs must function, SBCs evolved over the years. Which two operations demonstrate the high-level differences between SBCs and SIP proxies? (Choose two.)

  • A. SIP proxies are SDP-aware and can change the SDP bodies.
  • B. SIP proxies add a Via header and optionally a Record-Route header, and the rest of the headers are left untouched.
  • C. SBCs can modify headers such as To, From, Contact, and Call-ID. It can introduce new headers into the SIP message.
  • D. Stateful proxies are context-aware and can terminate communication sessions by themselves.
  • E. SBCs are capable of interworking completely different protocols to set up, modify, and tear down communication sessions. It includes SIP, H.323, and MGCP protocols.
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Suggested Answer: CE 🗳️

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G0y0
1 month, 3 weeks ago
Selected Answer: CE
A. is incorrect definitely. B. is partially correct. Certainly SIP proxies add a Via header and optionally a Record-Route header, but also, they can decrement the Max-Forwards header value by one, which is being omitted in this answer B with "and the rest of the headers are left untouched". D. is partially correct. Stateful proxies can terminate communications sessions ONLY after a final response has already been received, I mean, when the BYE is eventually received, but not by themselves exactly. So correct answers are C. and E. "Understanding SBC's Comprehensive Guide to Designing, Deploying, Troubleshooting, and Maintaining CUBE Solutions" Chapter 1: Laying the Groundwork
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b3532e4
7 months ago
https://www.youtube.com/watch?v=-Sn2V1Qnf3o C Definitely Correct answer, but E & B its okay , Idont know
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cyberknock
7 months, 2 weeks ago
Thinking the same
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b3532e4
8 months ago
B & C i think
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