What is a port?

What is a port?

Communication Gates (Ports): They are gates or communication ports, and some may think that they are physical ports that they can see as printer and mouse ports, but in reality it is a part of the memory that has a specific address that the device recognizes as a communication area through which data is sent and received and a large number can be used There are more than 65,000 ports of call for communication.

Each port is distinguished from the other by its number. For example, port No. 1001 can make a connection through one method, and at the same moment port No. 2001 is used to make another connection. Communication takes place between the two devices through the ports.

Explain the concept of ports

Ports in their simplest form are passages that allow the exchange of information and data between the Internet and the computer, as the person who wants to connect to the Internet service must use a passage or port to cross into this wide world until communication and communication takes place, and the number of ports in the device is (65535 Port and each of these ports has a specific function or service and specific programs use specific ports. For example, it is known that port 80 is often designated for surfing the Internet, and at times the port number is 8080.

Ports are divided into three sections:




The Well Known Ports are fixed numbers for specific applications defined by INAN and are in the range 0-1023.

The Registered Ports are the ones that private companies reserve for their applications, and they are located in the range 1024 - 49151.

The Dynamic and/or Private Ports are those that are not fixed but rather variable and are located in the range 49152 - 65535.

In TCP/IP networks, information is transmitted from the Port in the computer sending the information to the Port in the computer receiving the information according to the number of the Port and the program that uses this Port. Zero to 65535 Also, for information, the Ports are divided into TCP Ports and UDP Ports according to the program that runs on this port. For example, all servers that connect to Telnet service use Port No. 23, which is TCP Port, and also Web servers work on Port No. 80 It is for the HTTP program.