what is TCP AND UDP ?

Question

what is TCP & UDP

Answer 1

TCP Transmission Control Protocol TCP takes care of keeping track of the individual units of data (called packets) that a message is divided into for efficient routing through the Internet. Therefore it ensure the delivery of data or Packets to the receiver. TCP offer error recovery services



UDP User Datagram Protocol is also responsible, but cannot ensure delivery of Data to the receiver. UDP does not provide the service of dividing a message into packets (datagrams) and reassembling it at the other end. Therefore, all packets Must arrive in the order they we sent. UDP does not offer error recovery services.



Both operate at Layer 4 (Tansport Layer) of the OSI model & Transport Layer in a TCP/IP stack.

Answer 2

The TCP protocol exists on the Transport Layer of the OSI Model.



The TCP protocol is a connection-oriented protocol which provides end-to-end reliability.



By connection-oriented, we mean that before two network nodes can communicate using TCP, they must first complete a handshaking protocol to create a connection.



When we say that TCP provides end-to-end reliability, we mean that TCP includes mechanisms for error detection and error correction between the source and the destination.



These properties of TCP are in contrast to UDP, which is connectionless and unreliable.



Higher layer protocols which utilize TCP include HTTP, SMTP, NNTP, FTP, telnet, SSH, and LDAP.

Answer 3

In computer networking, a port is an application-specific or process-specific software construct serving as a communications endpoint used by Transport Layer protocols of the Internet Protocol Suite such as Transmission Control Protocol (TCP) and User Datagram Protocol (UDP). A specific port is identified by its number commonly known as the port number.



User Datagram Protocol (UDP) is one of the core protocols of the Internet Protocol Suite. Using UDP, programs on networked computers can send short messages sometimes known as datagrams (using Datagram Sockets) to one another. UDP is sometimes called the Universal Datagram Protocol



The Transmission Control Protocol (TCP) is one of the core protocols of the Internet Protocol Suite. TCP is so central that the entire suite is often referred to as "TCP/IP." Whereas IP handles lower-level transmissions from computer to computer as a message makes its way across the Internet, TCP operates at a higher level, concerned only with the two end systems, for example a Web browser and a Web server. In particular, TCP provides reliable, ordered delivery of a stream of bytes from one program on one computer to another program on another computer. Besides the Web, other common applications of TCP include e-mail and file transfer. Among its management tasks, TCP controls message size, the rate at which messages are exchanged, and network traffic congestion.

Answer 4

TCP and UDP are 'ports'. As you probably know, every item on the internet (PC, router, etc) gets an IP address. This is very comparable to the address on your home. Using the same analogy, a port is like telling your meter reader to use the side gate, the meter is right there, but telling a friend to open the garage door since you'll be working in there. The meter reader goes to his 'port' and your buddy will use his, while most other visitors will use the front port (door). Games use specific ports: These will be turned on automatically on your computer when you install the game, but they can be blocked by either your firewall software or your router. (In some cases your ISP can block them too, but, they normally don't block gaming ports all games use similar ports.) I suspect changing your firewall or router will cease your problem. I can't say for sure, because your message was truncated before the text of your error message was complete.

Answer 5

They're both protocols on how data is transferred.



TCP is more browser to server, where-as UDP is a less reliable system for transferring small bits of information computer to computer.



It's been a while since I researched it, but I think I'm fairly close.

Answer 6

It is hard too explained only by me.

in general, TCP (Transmission Control Protocol) is a protocol to transport data between host in local network or outer network, and UDP (User Datagram Protocol) is another one.

Both of them have different function.

TCP have more reliability than UDP..



for more info see wikipedia: en.wikipedia.org/wiki/Transmission_Control_Protocol

en.wikipedia.org/wiki/User_Datagram_Protocol

good luck..

Answer 7

TCP: http://en.wikipedia.org/wiki/Transmission_Control_Protocol



UDP: http://en.wikipedia.org/wiki/User_Datagram_Protocol

Answer 8

protocols at the transport layer in OSI ref. model, main differences



i.e rules for transfering segments/packets over the net

TCP- requests confirmation; larger header;slower;reliable

UDP- best effort;smaller header;faster;less reliable

Answer 9

They are network protocols, governing how network traffic is transmitted between computers.