Which of the following ports support hot swapping?

Which of the following ports support hot swapping?
Each correct answer represents a complete solution. Choose two.

A.
USB

B.
Parallel

C.
Serial

D.
IEEE 1394

Explanation:

USB and IEEE 1394 ports support hot swapping.
What is USB?
Universal Serial Bus (USB) is a high speed bus standard developed by Compaq, IBM, DEC, Intel,
Microsoft, NEC, and Northern Telecom. It provides the Plug and Play capability of Windows to
external hardware devices. USB supports hot plugging, which means that a USB device can be
installed or removed while the computer is running. A single USB port can be used to connect up to

127 peripheral devices, such as CD-ROM drives, tape drives, keyboards, scanners etc. USB 1.1 has a
maximum data transfer rate of 12 Mbps, whereas USB 2.0 has a maximum data transfer rate of 480
Mbps. USB 2.0 is
fully backward compatible with USB 1.1.
What is IEEE 1394?
Institute of Electrical and Electronics Engineers (IEEE) 1394 is a standard for high-speed serial bus
that provides enhanced PC connectivity for a wide range of devices. These devices include consumer
audiovisual components, traditional PC storage devices, and handheld devices. IEEE 1394 is also
known as Firewire.
Answer options C and B are incorrect. Serial and parallel ports do not support hot swapping or hot
plugging.