[tcp] Difference between TCP and UDP?

TCP is a connection oriented stream over an IP network. It guarantees that all sent packets will reach the destination in the correct order. This imply the use of acknowledgement packets sent back to the sender, and automatic retransmission, causing additional delays and a general less efficient transmission than UDP.

UDP is a connection-less protocol. Communication is datagram oriented. The integrity is guaranteed only on the single datagram. Datagrams reach destination and can arrive out of order or don't arrive at all. It is more efficient than TCP because it uses non ACK. It's generally used for real time communication, where a little percentage of packet loss rate is preferable to the overhead of a TCP connection.

In certain situations UDP is used because it allows broadcast packet transmission. This is sometimes fundamental in cases like DHCP protocol, because the client machine hasn't still received an IP address (this is the DHCP negotiaton protocol purpose) and there won't be any way to establish a TCP stream without the IP address itself.

Examples related to tcp

What does "app.run(host='0.0.0.0') " mean in Flask What is the difference between HTTP 1.1 and HTTP 2.0? Sending a file over TCP sockets in Python Telnet is not recognized as internal or external command How to open port in Linux adb connection over tcp not working now Understanding [TCP ACKed unseen segment] [TCP Previous segment not captured] How do I debug error ECONNRESET in Node.js? Differences between TCP sockets and web sockets, one more time Is SMTP based on TCP or UDP?

Examples related to network-programming

Difference between PACKETS and FRAMES socket connect() vs bind() How to read all of Inputstream in Server Socket JAVA C# An established connection was aborted by the software in your host machine Asynchronous Function Call in PHP TCP: can two different sockets share a port? trace a particular IP and port How is TeamViewer so fast? Recommended way to get hostname in Java Difference between TCP and UDP?

Examples related to udp

How do I publish a UDP Port on Docker? Simple UDP example to send and receive data from same socket Is SMTP based on TCP or UDP? What does it mean to bind a multicast (UDP) socket? Sending and receiving UDP packets? How to send only one UDP packet with netcat? How is TeamViewer so fast? TCP vs UDP on video stream Difference between TCP and UDP? What are examples of TCP and UDP in real life?

Examples related to protocols

What is the technology behind wechat, whatsapp and other messenger apps? Difference between Pragma and Cache-Control headers? How can I send and receive WebSocket messages on the server side? Get protocol, domain, and port from URL Difference between TCP and UDP? Which Protocols are used for PING? How does the communication between a browser and a web server take place? How does DHT in torrents work? What is the difference between DTR/DSR and RTS/CTS flow control? How do I create my own URL protocol? (e.g. so://...)