What is the USB?

The full form of USB is "Universal Serial Bus”. It is a plug and play interface. USB is the most popular connection that is used to transfer data between the computer system and other devices like keyboard, mouse, printers, scanners, and joystick, etc.

It is used for input/output device data transfer and allows input hardware like mouse keyboard to input for computers, it is very handy and drivers are inbuilt to support mostly all the general devices.

USB is the foremost common sort of computer harbour utilized in today's computers. It can be utilized to associate consoles, mice, diversion controllers, printers, scanners, computerized cameras, and detachable media drives, to name some.

With the assistance of many USB centre points, you'll be able interface up to 127 peripherals to a single USB harbour and utilize them all at once


The features of USB are as follows:

  • Security − Your data is secured as to who can access it.

  • Capacity − It can store the data for example, 1gb, 4 gb, 6gb etc

  • Durability − How many read/writes cycles are there it allows the life of pen drive

  • Speed − At what speed data are transfer as USB 1 2 and 3 have different speeds eg 20mbps for USB 3 pen drive

All computer systems have more than one USB port. There are various types of USB connector like mini USB, micro USB and Type C USB.

The different USB types and their data transfer rates are as follows:

  • USB 1.0 = Low-Speed: 1.5 Mbps.

  • USB 1.1 = Full-Speed: 12 Mbps.

  • USB 2.0 = Hi-Speed: 480 Mbps.

  • USB 3.0 = SuperSpeed: 5 Gbps.

  • USB 3.1 = SuperSpeed: 10 Gbps.

The various USB data flow types are as follows:

  • Control transfers

  • Bulk transfers.

  • Interrupt transfers.

  • Isochronous transfers.


The advantages of USB are as follows:

  • USB is easy to use.

  • USB has a robust connector system.

  • USB is very low cost.

  • It has a different variety of connector types and sizes available.

  • It has true plug and play nature.

  • It has Low power consumption.

  • The Daisy chain consists of 127 USB components at the same time to one PC.

  • Fits almost all devices that have a USB port.


The disadvantages of USB are as follows:

  • USB has limited capability and overall performance.

  • USB does not provide the broadcasting feature, only individual messages can be communicated between host and peripheral.

  • The data transfer of USB is not as fast as other systems.