Computers need different ports for the different types of communications they make between them, either between two computers in the same network or a computer and an internet server, using the necessary protocols. But, what is Port 80? In the field of computing, the Port 80 is known as the port by default, by means of which an HTTP server “listens” to the request made by a client, that is, by a specific PC or computer.
Port 80 and HTTP: Learning everything
According to the experts, all those applications that work based on the IP (whether they are TCP or UDP) establish communication with a specific server (can be SMTP, FTP, TELNET or HTTP, etc.) through a port, in the case of HTTP, that port is 80. So while the PC of each one occupies a random port, at the moment of originating a request to the services, in the case of HTTP it will always be, indistinctly port 80, the one that listens or receive the service request made by the client PC.
How to check port 80
Image Source: twitter.com
Likewise, some computer experts advise that to have signs of port 80, a fairly simple procedure can be performed. Simply turn on the personal PC, do not open any browser other than Internet Explorer (You will need Internet Explorer, because you can’t use this method with Google Chrome or Mozilla Firefox), while other function windows are kept closed. Afterwards, the user must also open the MSDOS window, where he must enter the command netstar -n, with which a row of four columns will be obtained, for example:
TCP 134. 293.1.2: 4569 55.798.7.567:80 ESTABLISHED
With respect to this information, the first column would be indicating the source port. If the port is TCP, it will show you as just TCP, but it can be something like UDP. Secondly, the IP of the PC where the information is coming from is indicated, so you can see your pc IP right here. The next one, the third column, indicates the IP corresponding to the Google server, and port 80, which is the one that listens to the request that has left the PC. Finally, the last column indicates whether communication between the PC and the server has been established effectively. This way you can have signs of Port 80, located on the Server, which receives requests from remote computers.
Fore more about the Port 80: Click Here