CompTIA Network+ (N10-008) — Question 81

Which of the following ports is commonly used by VoIP phones?

Answer options

• A. 20
• B. 143
• C. 445
• D. 5060

Correct answer: D

Explanation

Port 5060 is the standard port used for SIP (Session Initiation Protocol), which is essential for VoIP communication. The other ports, 20, 143, and 445, are used for different protocols such as FTP, IMAP, and SMB respectively, and are not related to VoIP functionalities.