CompTIA Network+ (N10-007) — Question 209

A network technician is considering opening ports on the firewall for an upcoming VoIP PBX implementation. Which of the following protocols is the technician
MOST likely to consider? (Choose three.)

Answer options

• A. SIP
• B. NTP
• C. H.323
• D. SMB
• E. ICMP
• F. RTP
• G. IPSec
• H. RDP

Correct answer: A, C, F

Explanation

The correct answers are A (SIP), C (H.323), and F (RTP) because these protocols are essential for enabling VoIP communications. SIP and H.323 are signaling protocols used for setting up and managing calls, while RTP is used for the actual media transmission. The other options, such as NTP, SMB, ICMP, IPSec, and RDP, do not play direct roles in VoIP call establishment or media transfer.