What is the key difference between TCP and UDP?

What is the key difference between TCP and UDP?

• A. TCP is faster than UDP
• B. UDP is connection-oriented while TCP is connectionless
• C. TCP is connection-oriented and provides reliable transmission while UDP is connectionless and does not guarantee delivery
• D. Both TCP and UDP provide reliable transmission

Answer: (C)

The key difference between TCP (Transmission Control Protocol) and UDP (User Datagram Protocol) lies in their connection management and reliability features. TCP is described as connection-oriented, meaning that it establishes a connection between the sender and receiver before data transmission begins. This involves a handshake process that ensures both parties are ready to communicate. Once this connection is established, TCP provides reliable transmission by implementing mechanisms such as error checking, retransmission of lost packets, and data sequencing, thereby ensuring that data arrives in the correct order and without errors. In contrast, UDP is connectionless, which means it sends data without establishing a prior connection. This leads to faster data transmission because there are no delays for connection setup or maintenance. However, this speed comes at the cost of reliability; UDP does not provide guarantees for message delivery, ordering, or error checking. As a result, it's often used in applications where speed is critical and occasional data loss is acceptable, such as streaming media or online gaming. The distinction highlights the functional differences in how both protocols operate across networks, particularly in regards to reliability and the overhead associated with ensuring that data is accurately delivered.

The key difference between TCP (Transmission Control Protocol) and UDP (User Datagram Protocol) lies in their connection management and reliability features. TCP is described as connection-oriented, meaning that it establishes a connection between the sender and receiver before data transmission begins. This involves a handshake process that ensures both parties are ready to communicate. Once this connection is established, TCP provides reliable transmission by implementing mechanisms such as error checking, retransmission of lost packets, and data sequencing, thereby ensuring that data arrives in the correct order and without errors.

In contrast, UDP is connectionless, which means it sends data without establishing a prior connection. This leads to faster data transmission because there are no delays for connection setup or maintenance. However, this speed comes at the cost of reliability; UDP does not provide guarantees for message delivery, ordering, or error checking. As a result, it's often used in applications where speed is critical and occasional data loss is acceptable, such as streaming media or online gaming.

The distinction highlights the functional differences in how both protocols operate across networks, particularly in regards to reliability and the overhead associated with ensuring that data is accurately delivered.