PORTS                             

                              

COMPUTER PORTS are connection points or interfaces with other peripheral devices. There are two main types of computer ports: physical and virtual.

PHYSICAL PORTS:

 PS/2 ports were introduced in 1987 to replace the serial mouse and keyboard.

                                                 


Ethernet / internet ports was first introduced in 1980 to standardize the local area networks.Internet ports use RJ45 connectors and have speeds between 10 Mb/sec, 100 Mb/sec and 1 Gb/sec, 40 Gb/sec and 100 Gb/sec.

                    

                       
LPT1 Printer Port(Parallel Port).  Parallel port is used for data transfer between a computer and a peripheral device through a 25 or 36 pin connector. If the serial port transferred data one bit at a time in parallel communication multiple bits are transferred at a time

                    

 USB port ( Universal Serial Bus ) is the most used connection point for data transfer in the world. It was created in the mid-1990s with the intention of replacing all other PC ports like serial port,Parallel port, PS/2 port .  A standard usb connector is a simple socket with 4 pins : one for power, one for ground and two for data transfer.



                 



   

Serial port is a electronic communication gateway used for transferring data one bit at a time.

The vga port is used for connecting a computer to a monitor.

  


IEEE 1394 ports, this technology is developed by Apple between 1980 and 1990 with the name FireWire and it is the equivalent of the USB for Apple computers;

TRS ports are used for receiving and transmitting with analog signals like audio

 DVI are computer ports used to transmit uncompressed digital video data

 Virtual ports       

Virtual ports are data gates that allow software application (network) to use hardware resources without any interfering. This computer ports ( network ports ) are defined by IANA ( Internet Assigned Numbers Authority ) and are used by TCP ( Transmission Control Protocol ), UDP ( User Datagram Protocol ), DCCP ( Datagram Congestion Control Protocol ) and SCTP ( Stream Control Transmission Protocol ).

 FTP port ( File transfer Protocol ) – for network data transfer uses the 20 and 21 TCP ports by default.

PPTP port (Point-To-Point Tunneling Protocol) – for implementing virtual private networks uses the TCP / UDP port 1723

SFTP port ( Secret / Secure File Transfer ) – protects the data flow and uses the 22 TCP port

NTP port ( Network Time Protocol ) – for clock synchronization uses the 123 UDP port

HTTP port (Hypertext Transfer Protocol) – main protocol for data comunication in the World Wide Web, uses the 80 TCP port.

 SMTP port ( Simple Mail Transfer Protocol ) – for e-mail routing, uses 25 TCP port.

 SQL port ( Structured Query Language ) – for data management in relational databases, uses TCP / UDP port 118, 156.