Cisco Exam 350-801 Topic 12 Question 65 Discussion

Actual exam question for Cisco's 350-801 exam

Question #: 65
Topic #: 12

Refer to exhibit.

Refer to the exhibit. When a UC Administrator is troubleshooting DTMF negotiated by this SIP INVITE, which two messages are examined next to further troubleshoot the issue? (Choose two.)

AREGISTER

BSUBSCRIBE

CPRACK

DNOTIFY

EUPDATE

Show Suggested Answer

Suggested Answer: D

The Cisco Unified Communications Manager (CUCM) uses SIP Phone OAuth Port (5090) to listen for SIP line registration from Jabber OnPremise devices over TLS. However, CUCM uses SIP Mobile Remote Access Port (default 5091) to listen for SIP line registrations from Jabber over Expressway through mTLS. Both of these ports are configurable.

by Oretha at Oct 18, 2023, 11:46 AM

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Suzan

1 months ago

I think the PRACK and UPDATE messages are the way to go here. Those are definitely involved in the SIP session negotiation process, which is what this question is all about.

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Tamar

6 days ago

I believe REGISTER and PRACK messages are the key messages to look at for troubleshooting DTMF negotiation in this SIP session.

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Josephine

9 days ago

Nichelle: That's a good point, those messages could provide valuable insights as well.

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Virgie

17 days ago

I think NOTIFY and SUBSCRIBE messages should also be examined to get a complete picture of the issue.

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Val

23 days ago

I agree, PRACK and UPDATE messages are crucial for troubleshooting DTMF negotiation in SIP sessions.

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Nichelle

27 days ago

User 2: I think NOTIFY and SUBSCRIBE messages should also be examined to get a complete picture of the issue.

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Luann

1 months ago

User 1: I agree, PRACK and UPDATE messages are crucial for troubleshooting DTMF negotiation.

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Kimberely

1 months ago

Aw, man, this question is tricky. I wish they'd just ask about something simple, like how many fingers I have. That's a DTMF I can handle!

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Laura

2 months ago

I'm not sure about this one. Maybe the SUBSCRIBE and NOTIFY messages are involved in DTMF negotiation, but I'm not confident. I guess I'll have to study up on SIP more before the exam.

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Carey

9 days ago

D) NOTIFY

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Becky

16 days ago

C) PRACK

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Craig

28 days ago

B) SUBSCRIBE

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Gearldine

30 days ago

A) REGISTER

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Hoa

2 months ago

Hmm, the question is specifically asking about DTMF negotiation, so I'm thinking C and D might be the correct answers. The NOTIFY message is used to report events, which could be relevant for DTMF.

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Marg

1 months ago

Yes, NOTIFY and PRACK messages are important to examine when troubleshooting DTMF negotiation.

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Zona

1 months ago

I think you're right, C and D seem like the most relevant messages for troubleshooting DTMF negotiation.

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Lynda

2 months ago

I think option C and E are the two messages we need to examine next. The PRACK message is used for provisional responses, and the UPDATE message is used to update the session parameters.

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