Is the statement 'TCP/IP is the common application layer protocol used by voice gateways to initiate and maintain connections' true or false?

Is the statement 'TCP/IP is the common application layer protocol used by voice gateways to initiate and maintain connections' true or false?

• A. True
• B. False
• C. Not enough information
• D. Depends on the vendor.

Answer: (B)

The statement is false because TCP/IP is a suite of protocols that spans multiple layers, not a single application-layer protocol. In voice gateways, signaling to set up and manage calls is handled by application-layer protocols such as SIP (Session Initiation Protocol) or, historically, H.323. TCP or UDP may transport those signaling messages, and RTP carries the actual voice media, but the signaling itself is not performed by TCP/IP as an application-layer protocol. While SIP is widely used today, some vendors may use alternatives, the key point is that TCP/IP is not the application-layer protocol used to initiate and maintain VoIP connections.

The statement is false because TCP/IP is a suite of protocols that spans multiple layers, not a single application-layer protocol. In voice gateways, signaling to set up and manage calls is handled by application-layer protocols such as SIP (Session Initiation Protocol) or, historically, H.323. TCP or UDP may transport those signaling messages, and RTP carries the actual voice media, but the signaling itself is not performed by TCP/IP as an application-layer protocol. While SIP is widely used today, some vendors may use alternatives, the key point is that TCP/IP is not the application-layer protocol used to initiate and maintain VoIP connections.