nothing. Most USB ports are version 2.0, some of the new ones coming out are USB version 3.0 which is a lot faster.
The speed of a USB 2.0 port varies, depending on the hardware being used. However, the top speed the 2.0 port can reach is 480 Mbit/s.
well i don't think the question given is a correct question because like give the difference between the keyboard port and the usb port
A USB modem plugs into your USB port.A "normal" modem plugs into your RS232 port or your parallel port.
A COM port can not be converted to a USB port just by using software. The signal types, levels, protocol, connector type all are different.
USB3
Universal Serial Bus [USB]
Super Speed USB is faster and is usually identified by a blue port or wire. Basically USB 2.0 is High Speed (480Mbps) and USB 3.0 Super Speed (5Gbps).
A FD (flashdrive) is a portable data storage device that uses flash memory. A USB port is a port for a USB cable or anything that has USB capabilities, to plug into. For example, a FD normally plugs into a USB port.
USB port.
The USB port is hardware.
USB Port
port and speed