What is the primary function of TCP?

What is the primary function of TCP?

• A. UDP is faster
• B. TCP ensures all packets arrive and can be reassembled in order
• C. IP addresses
• D. DNS resolution

Answer: (B)

The main idea is that TCP provides reliable, ordered delivery of data. It builds a connection, breaks data into segments, assigns sequence numbers, and uses acknowledgments and retransmission to ensure every piece arrives correctly and can be reassembled in the original order at the destination. This reliability and in-order delivery is what TCP is designed to guarantee, which is why it’s the best answer. UDP, by contrast, can be faster because it doesn’t guarantee delivery or order, which is why it isn’t the primary function of TCP. IP addresses relate to identifying and routing hosts, and DNS resolution translates names to addresses, not to ensuring reliable data transport.

The main idea is that TCP provides reliable, ordered delivery of data. It builds a connection, breaks data into segments, assigns sequence numbers, and uses acknowledgments and retransmission to ensure every piece arrives correctly and can be reassembled in the original order at the destination. This reliability and in-order delivery is what TCP is designed to guarantee, which is why it’s the best answer.

UDP, by contrast, can be faster because it doesn’t guarantee delivery or order, which is why it isn’t the primary function of TCP. IP addresses relate to identifying and routing hosts, and DNS resolution translates names to addresses, not to ensuring reliable data transport.