What is TCP & UDP

Question

What is TCP & UDP

Accepted Answer

TCP (Transmission Control Protocol) and UDP (User Datagram Protocol) are two protocols used in computer networking.

TCP is a connection-oriented protocol that provides reliable and ordered delivery of data packets.
UDP is a connectionless protocol that provides fast and unreliable delivery of data packets.
TCP is used for applications that require guaranteed delivery of data, such as web browsing and email.
UDP is used for applications that prioritize speed over reliability, such as streaming media and online gaming.
TCP uses a three-way handshake to establish a connection between two devices.
UDP does not establish a connection and simply sends data packets without any guarantee of delivery or order.
TCP adds additional overhead due to its reliability mechanisms, while UDP has lower overhead.
TCP is used for protocols like HTTP, FTP, and SMTP, while UDP is used for protocols like DNS and DHCP.

Accepted Answer

TCP (Transmission Control Protocol) and UDP (User Datagram Protocol) are two fundamental protocols in the internet protocol suite (TCP/IP) that enable communication over the internet.

TCP:

- Connection-oriented protocol
- Ensures reliable data transfer
- Guarantees data delivery in the correct order
- Establishes a connection before data transfer
- Slower due to error checking and retransmission

UDP:

- Connectionless protocol
- Best-effort data transfer (no guarantee of delivery)
- Faster than TCP due to lower overhead
- Typically used for real-time applications (video, audio, gaming)

In summary:

- TCP is reliable but slower
- UDP is faster but less reliable

When to use each:

- TCP: File transfers, email, web browsing
- UDP: Video streaming, online gaming, VoIP calls

What is TCP & UDP

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