USB (Universal Serial Bus) and Its Types

USB (Universal Serial Bus) is a standard interface used for connecting peripherals like keyboards, mice, printers, external storage devices, and smartphones to computers. It allows fast data transfer, charging, and communication between devices.

1. Types of USB Ports & Connectors

(A) USB Type-A

The most common rectangular USB port used in PCs, laptops, and chargers.
Supports USB 1.0, 2.0, 3.0, and 3.1 versions.

(B) USB Type-B

Square-shaped, mostly used for printers and external hard drives.

(C) USB Type-C

Reversible design, supports faster data transfer (up to 40Gbps).
Used in modern smartphones, tablets, and laptops.
Supports Power Delivery (PD) for fast charging.

(D) Micro USB

Smaller than Type-A, used in older smartphones and accessories.
Now replaced by USB-C in modern devices.

(E) Mini USB

Used in older cameras and MP3 players.

2. USB Versions & Speeds

USB Version	Speed	Uses
USB 1.0 & 1.1	1.5 Mbps - 12 Mbps	Basic peripherals (legacy devices)
USB 2.0	480 Mbps	Flash drives, external HDDs
USB 3.0 & 3.1	5 Gbps - 10 Gbps	High-speed data transfer
USB 3.2	20 Gbps	Faster external SSDs
USB 4.0	40 Gbps	High-performance storage, Thunderbolt support

Conclusion

USB is an essential technology for data transfer, charging, and device connectivity. With advancements like USB-C and USB 4.0, it offers faster speeds, universal compatibility, and better power delivery for modern devices.