Question

Compare and contrast the following technologies

(i) Parallel port and USB

(ii) Graphics Tablet and Mouse

(iii) Scanner and Optical mark reader

(iv) LCD and LED monitors

21 Jan 2021
Answer :
Word Count : 1215

## I. Parallel Port and USB:

Parallel Port:
Parallel ports are a type of interface used for connecting devices to a computer. They were widely used in older computers to connect printers, scanners, and other peripherals. Parallel ports can transfer multiple bits of data simultaneously, making them suitable for devices that require high data transfer rates. However, they are relatively bulky and have limited speed capabilities.

USB (Universal Serial Bus):
USB is a standard interface used in modern computers for connecting a wide variety of devices, including keyboards, mice, printers, cameras, and external storage devices. USB ports are much faster than parallel ports and support hot-swapping, allowing devices to be connected and disconnected without restarting the computer. USB technology has evolved over the years, with different versions (USB 1.1, 2.0, 3.0, 3.1, and 3.2) offering varying data transfer speeds. USB ports are smaller and more versatile than parallel ports.

*Comparison and Contrast:*
- Speed: USB ports are significantly faster than parallel ports. USB 3.2, the latest version, can transfer data at speeds up to 20 Gbps, whereas parallel ports have a maximum speed of 2 Mbps.
- Versatility: USB ports are versatile and can support a wide range of devices, including keyboards, mice, audio interfaces, and external storage. Parallel ports are mainly used for printers and scanners.
- Size: USB ports are smaller and more compact, allowing for thinner devices and efficient use of space on modern computers. _____ ___ ___ ___ ______ ______.
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