Which protocol is faster than TCP but unacknowledged and commonly used in VoIP?

The chosen answer is correct because UDP, or User Datagram Protocol, is indeed faster than TCP (Transmission Control Protocol) and is the preferred choice for applications like VoIP (Voice over Internet Protocol).

UDP operates on a connectionless basis, meaning it does not establish a direct connection before data transfer and does not require acknowledgments for received packets. This results in lower latency, which is critical in real-time communications such as voice and video calls. During these interactions, timely delivery of packets is more important than ensuring every single packet arrives in the correct order or is even received at all. Therefore, UDP sacrifices reliability for speed, making it a suitable option for VoIP applications that can tolerate some loss of data without a significant impact on user experience.

In contrast, TCP is designed for reliability, ensuring that every packet sent is acknowledged and received in the correct order, which introduces overhead and latency that would hinder real-time communication. HTTP is an application protocol that relies on TCP, further confirming that it is not suitable for applications requiring unacknowledged, fast communication. ICMP (Internet Control Message Protocol) is typically used for network diagnostics and error messages, functioning at a different layer and is not intended for data communication like VoIP. Thus, UDP is