Packets are small chunks of information that are used to transmit data over the internet. They contain a delivery address, return address, and message.

Packet switching is the method used to send packets over the internet, allowing for efficient and flexible routing.

Packet switching has advantages such as minimal interference and the ability to resend lost or corrupted packets.

Data transmission can be done through wired connections, including serial and parallel transmission, simplex, half-duplex, and full-duplex.

Each method of data transmission has its advantages and disadvantages, such as speed, cost, and complexity.

USB is a widely used method of data transmission between devices, with different connectors and automatic device detection.

USB has advantages such as automatic driver loading and compatibility, but also limitations in cable length and transmission rates.

USB connections have several benefits, including the ability to be inserted correctly, support for different transmission speeds, high-speed transmission, automatic detection, and the ability to power devices for data transfer.

USB connections use serial data transmission.