Introduction:
The Universal Serial Bus (USB) is an industry standard that defines cables, connectors, and communication protocols used in a bus for connection, communication, and power supply between computers and electronic devices.

USB 2.0:
USB 2.0 was released in April 2000 and became the most widely used version of the USB standard. It had a maximum data transfer rate of 480 Mbps, which was 40 times faster than its predecessor, USB 1.1. USB 2.0 was backward compatible with USB 1.1 devices.

High-Speed Mode of USB:
The high-speed mode of USB was introduced by USB 2.0. It allowed for faster data transfer rates, which made it possible to transfer large files quickly. The high-speed mode of USB 2.0 had a maximum data transfer rate of 480 Mbps. This was achieved by using four wires to transmit data instead of two wires used in USB 1.1.

Advantages of High-Speed Mode:
1. Faster Data Transfer Rates: The high-speed mode of USB 2.0 provided faster data transfer rates, which made it possible to transfer large files quickly.

2. Backward Compatible: The high-speed mode of USB 2.0 was backward compatible with USB 1.1 devices. This means that USB 2.0 devices could be used with USB 1.1 ports, but at lower data transfer rates.

3. Increased Power Efficiency: The high-speed mode of USB 2.0 increased power efficiency by allowing devices to consume less power when idle or in standby mode.

Conclusion:
In conclusion, USB 2.0 introduced the high-speed mode of USB, which allowed for faster data transfer rates and increased power efficiency. It became the most widely used version of the USB standard and was backward compatible with USB 1.1 devices.