What is computer bus?
A set of electrical paths through which computer (CPU) sends and receives
data and instructions (and also sends command signals) to and from different
components of computer is called compiler bus.
What do you mean by bus width?
The amount of data (or number of bits) that a Bus can carry at one time is known as bus width.
Different Types of Computer Buses:
Expansion Buses are also known as External Buses. These Buses connect the peripheral devices (or external devices) with the computer system. The peripheral devices include keyboard, mouse, modem, printer etc. Expansion Buses allow the processor to communicate with the peripherals.
The system buses are also called the Internal Buses. The System Buses are the part of motherboard. These are used to connect the main component of the computer such as CPU and main memory. Normally computers have system buses of 70 — 100 lines.
A type of system bus, which is used to transfer data between different components of computer, is called data bus. Data bus consists of 8, 16, 32 or 64 parallel lines. Each line can carry only 1 bit at a, time. A data bus of 64-line can transfer 64-bits (or 8 bytes) of data at a time.
A type of system bus, which is used to carry address information of different components or memory locations of the computer, is called address bus.
A type of system bus through which CPU sends control signals to different units
of computer is called control bus.