Why is UDP more suitable than TCP for applications that require low latency such as VoIP?

This statement is incorrect; UDP does *not* reliably guarantee delivery of all packets, and while TCP can drop packets, its primary goal is reliable delivery through retransmission.

This statement is incorrect; TCP *uses* sequencing to ensure in-order delivery, whereas UDP does *not* inherently provide sequencing.

This statement is incorrect; TCP uses both congestion control and flow control, while UDP generally lacks these sophisticated mechanisms, contributing to its lower overhead and suitability for real-time traffic.

TCP employs an acknowledgment mechanism where the receiver sends an acknowledgment (ACK) for every segment successfully received, and the sender retransmits unacknowledged segments, which adds significant overhead and latency. UDP, by contrast, is a connectionless protocol that sends data without requiring acknowledgments or retransmissions, thereby minimizing overhead and latency, which is crucial for real-time applications like VoIP where timely delivery is more important than guaranteed delivery of every single packet.