A com port is the old type of serial port on a PC. They are numbered, and some PCs had two or more. Someone might use com port one for a mouse and com port two for a modem.
COM 1 means SERIAL port number 1
A com port can also be called a serial port.
how many ports does com port have
Use the "change port" command (without the quotes, of course) to change the port you're deciding to map to somewhere else. First, to display the current com port mappings, you can use change port / query Then, to change a port, type change [old com port]=[new com port] NOTE: Change the text in the brackets to the actual com port, making sure to use keyword "COM," again without the quotes, and in the example, without the brackets Here's an example: change port COM2=COM4 Finally, to delete a COM port listing, use the following format: change port /d [COM PORT] Here's an example of deleting a COM port listing: change port /d COM8 Hope this helps!
Communication Port.
On recent computers the 25 pin D-sub is for the parallel port that is used to connect a printer to. On older (back in the mid to early 90s) there was also a 25 pin D-sub that was used as a COM (communication) port. The difference between the two is the printer port is a female port and the COM port is a male port.
COM port is used to configure a router but you can also get a COM port to USB port adapter which can configure a router using a USB port.
Serial Port
Com port
Your computer might not necessarily have a com port at all. A com port is just an older style serial port. USB ports have replaced com ports for the most part. If you have any com ports, they would be on the back of the computer. They would be male (pins sticking out), and have 9 or 25 pins. If there is a 25-pin female D-socket, that would be a parallel port.
Rollover cable is used.
On a digital multi-meter the black lead connects to the common (COM) port in the meter.