A hardware that acts as a bridge between CPU and I/O devices is called: Group of answer choicesDevice controllerBusDevice driverPort

The hardware that acts as a bridge between the CPU and I/O devices is called a Bus.

Here's a step-by-step explanation:

1. The CPU (Central Processing Unit) is the primary component of a computer that performs most of the processing inside the computer. It's often referred to as the "brain" of the computer.

2. I/O devices (Input/Output devices) are the tools that provide the computer with the ability to interact with the outside world. Examples include keyboards, mice, monitors, printers, etc.

3. A Bus is a communication system that transfers data between components inside a computer, or between computers. In this context, it acts as a "bridge" between the CPU and the I/O devices, facilitating the transfer of data between them.

4. A Device controller, Device driver, and Port are also involved in the communication between the CPU and I/O devices, but they perform different roles. The Device controller is a hardware interface that manages a particular type of device. The Device driver is a type of software that controls a specific type of hardware device. A Port is a physical docking point using which an external device can be connected to the computer.

So, in the context of your question, the correct answer is Bus.