Definition of TCP/IP:
Transmission Control Protocol/Internet Protocol (TCP/IP) is a communications protocol developed under contract from the U.S. Department of Defense to internetwork dissimilar systems. Invented by Vinton Cerf and Bob Kahn, this de facto Unix standard is the protocol of the Internet and the global standard for communications.
TCP protocol:
Transmission Control Protocol (TCP) is the reliable transport protocol within the TCP/IP protocol suite. TCP ensures that all data arrive accurately and 100% intact at the other end. TCP's unreliable counterpart is UDP, which is used for streaming media, VoIP and videoconferencing.
TCP is "connection oriented" and requires a handshake before the session can begin.
UDP protocol:
User Datagram Protocol is a protocol within the TCP/IP protocol suite that is used in place of TCP when a reliable delivery is not required. There is less processing of UDP packets than there is for TCP. UDP is widely used for streaming audio and video, voice over IP (VoIP) and videoconferencing, because there is no time to retransmit erroneous or dropped packets.
If UDP is used and a reliable delivery is required, packet sequence checking and error notification must be written into the applications.
UDP is "connectionless" and does not use a handshake to start a session.
Simply:
TCP and UDP are transport protocols used for communication between computers. The IANA (Internet Assigned Numbers Authority) is responsible for assigning port numbers to specific uses.
Direction for use this site:
- To search a TCP or UDP port, type it into the search field at top of this page, and click on the "Search" button. For example, to find information from 25/tcp port, simply enter 25 into the search field at top and click on the button.
- If you can't find a port number here, please come back later, our database is updated day by day!