Tag: layer 4

TCP and UDP port numbers – complete list

This is a list of Internet socket port numbers used by application communication with TCP and UDP on the Transport Layer of the Internet Protocol Suite for the host-to-host communications.

Let’s see who makes it possible? The Internet Assigned Numbers Authority (IANA) assigns all port numbers except Dynamic or Private ports. IANA is a standards organization in the world that is responsible for assigning various addressing standards.

There are different types of port numbers: Well Known Ports (Numbers 0 to 1023), Registered Ports (Numbers 1024 to 49151) and Dynamic or Private Ports (Numbers 49152 to 65535). The last porn number type Dynamic or Private Ports will not appear on our list because they are cannot be registered with IANA. This range is used for custom or temporary purposes and for automatic allocation of ephemeral ports. They are usually assigned dynamically to client applications when initiating a connection. It is not very common for a client to connect to a service using a Dynamic or Private Port, sometimes some peer-to-peer file sharing programs do.

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UDP – User Datagram Protocol

Let’s see what is UDP – User Datagram Protocol. Inside the computer world, term “networking” is denoted to the physical joining of two machines for different purposes like communication and data distribution. But mesh of this hardware and computer’s software can communicated with each other with the help of specially designed protocols. Moreover, computer networks can be categorized on the basis of such communication languages (protocols) used by a network.

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TCP – Transmission Control Protocol

TCP – Transmission control protocol in short terms is used as TCP which is one amongst the TCP/IP prime protocols. Its function is to allow two hosts, to set up a connection first over the internet and then exchange the data in form of stream. Reliability of TCP can be judged from that it provides the guarantee of data delivery by ensuring so that each packet will be transferred in the same pattern as was designed at the time of depart.

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