CompTIA Network+ (N10-007) — Question 89

A network technician has recently installed new VoIP phones at all employee's desks to support a new SIP cloud VoIP solution. However, the technician is unable to make a call from the device after testing. Which of the following should the technician verify? (Choose two.)

Answer options

• A. TCP 443 is allowed.
• B. UDP 1720 is allowed.
• C. UDP 5060 is allowed.
• D. UDP 5061 is allowed.
• E. TCP 8080 is allowed.
• F. TCP 8181 is allowed.

Correct answer: C, D

Explanation

The correct answers are C and D because UDP 5060 is used for SIP signaling, while UDP 5061 is utilized for secure SIP signaling. The other options are not directly related to SIP call setup, which is why they are incorrect.