What is the difference between a buffer and a driver?

This is largely a matter of perspective. A buffer tends to be an insertion element that insulates the power supply from the properties of the load, but provides the same or nearly the same voltage and current as its own input. The driver usually raises the current source/absorber level or raises the voltage at its output to the load. In many cases, the snubber and driver aspects are combined. The driver usually provides additional protection against circuit problems.

What is the symbol for a buffer? How are buffers/drivers implemented?

The buffer symbol is simple, as shown in the figure. The symbol does not imply the subtleties or internal complexity of many buffers. In many ICs, the buffer/driver is built into the source IC, but many discrete buffer and driver ICs are also used, depending on how much current needs to be delivered and at what voltage level. Note that buffers for analogue signals often use the same symbols as digital signals.

What Does Receiver Mean?

A receiver is a hardware component or device designed to capture signals, which can vary depending on the specific application. It may receive analog electromagnetic waves or digital signals via wired connections. The term "receiver" is most commonly associated with communication systems, particularly wireless networks and cellular communication. Its function is to receive, decode, and process signals, converting them into a format that can be understood by another device or computer.

What is a Transceiver?

A transceiver is an electronic device capable of both transmitting and receiving signals. It typically combines a transmitter and receiver into a single, compact unit. Transceivers are widely used in various applications, including wireless communication, fiber optics, and amateur radio, among others.