A virtual port is a software emulation of a port which normally would be present in hardware. This is most commonly used with modems and printers.
Many internal modems emulate a COM port. When modems first became common by far the most common type was an external modem which plugged into a serial port (a COM port) in the back of the machine. Nearly all of the early dial-up networking applications were written with the assumption that the modem could be found on one of these COM ports. While it is no longer necessary for the modem to reside on a COM port, most new modems still emulate one in order to maintain compatibility with these legacy applications. Printers can also reside on a virtual port for much the same reasons. All printers used to plug into a parallel port (an LPT port) on the computer. As a result many legacy programs were written with the assumption that any printers would be located on an LPT port. When USB printers became commonplace it became necessary to allow these USB printers to be assigned a virtual parallel port in order to maintain compatibility with these older programs. This can be configured in the OS in the printers settings and is most often used for DOS-level point-of-sale or data-entry applications.
A USB virtual COM port is a software interface that enables applications to access a USB device as if it were a built-in serial port. Many USB virtual COM-port devices function as bridges that convert between USB and RS-232 or other asynchronous serial interfaces.
how many ports does com port have
This is the communications port on your computer, also called the COM or RS-232 port.
A physical port, as opposed to a virtual or logical port is an interface on a computer into which you can insert a connector for a device.
In the past external modems connected to the COM (or serial) port. However, most modern external hardware is USB these days, modems are no exception.
No. Both COM ports and USB ports are serial interfaces, but the COM interfaces are driven by single device UARTs.
A COM surrogate is often used in computer science and is also known as a virtual COM port. It is used in cases when a computer has no COM port (type of connection) and is used to trick the computer into thinking it has one, while using a different one (USB for example), while having attached an USB to COM switch to that USB port.
A com port can also be called a serial port.
how many ports does com port have
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.
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.
COM 1 means SERIAL port number 1
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.
Com port
Serial Port
A Port Splitter is used to create serial ports between running several different applications on one device. By doing this one can still get all the same data at one time and the port splitter works with virtual machines and existing COM ports.
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.