Yes, there are controllers that can still connect via a serial port.
You can have a USB Serial (COM) port and you can connect PCs together using Serial (COM) port.
It would connect to the serial port interface of a router.
The serial port is mostly used to connect Modems. However, there are many devices that can connect to the serial port. Some of these are, mouses, trackballs, scanners, Ham radio equipment, cash registers and many many more.
Serial port is by far the fastest port. It is so fast that it is used in modern computer to connect hard drive to motherboard. Current generation of serial port is SATA 6Gpbs.
Yes.
You can purchase a USB to Serial lead, which will work.Hope this helpsbe safe
Depending on how old the modem is, it may connect to the serial port, the USB port, or an internal connector.
Many of the oldest types of joysticks connect via a serial port. The next generation of joysticks used a port called the game port. Most of the newer joysticks available today connect via a USB port.
One reason for the usb port is so you can connect the controllers for games like Rock Band.
A Serial port looks like this: http://www.ergocanada.com/ergo/tips/serial_port.jpg It is used to connect your PC to a monitor or projector. A USB port looks like this: http://www.novopc.com/wp-content/uploads/2008/10/usb.jpg It is used to connect a wide variety of peripherals to your PC
The USB port, unless it is a Bluetooth mouse, then there is no port, it will connect via Bluetooth.
Serial and USB ports are most often used to connect an external modem to a PC.