Communication between a computer and a keyboard involves

On "modern" computers, you can connect the keyboard via USB or via the PS/2 keyboard port.
Both use a half-duplex protocol (data can be sent only one direction at a time, not both directions at once).
The communication between computer and keyboard involves Simplex transmission.
One-way or unidirectional communication between two devices is called simplex transmission or simplex communication.
In this, one device is the sender, while the other device is the receiver.

The correct answer is Simplex. Communication between a computer and a keyboard involves simplex transmission because here data flows in a single direction. Simplex transmission is a type of transmission mode.

How a USB keyboard works with a computer?

Keyboard works with Computer using USB interface which has 4 lines (+5V, D+, D-, Ground).
Keyboard works in device mode where as Computer works in Host mode.
So when you connect USB keyboard (first time) to the Computer then Computer starts understanding it and recognized as USB Keyboard and Keyboard gets power from Computer.

Is the communication between host and keyboard half duplex?

So the communication is definitely half duplex:

host sends IN request on (differential) data line

keyboard responds with data which key was pressed or depressed

on same data wires.
If data were received successfully, the host returns "ACK".
If no key was pressed, the keyboard returns "NAK", and does nothing until next inquiry.

What's the difference between a USB keyboard and a PS2 keyboard?

There is a difference how USB and PS/2 devices operate.
A USB keyboard doesn't send any data on its own unless the host makes a request.
So the communication is definitely half duplex:

host sends IN request on (differential) data line

keyboard responds with data which key was pressed or depressed

on same data wires.

Which type of transmission is involved in communication between a computer and a keyboard?

The correct answer is Simplex.
Communication between a computer and a keyboard involves simplex transmission because here data flows in a single direction.
Simplex transmission is a type of transmission mode.
In this type of transmission mode, data can be sent only through one direction i.e. communication is unidirectional.

What is communication between computer and a keyboard?

Communication between computer and a keyboard involves

Communication between computer and a keyboard involves Simplex transmission

Simplex communication is a communication channel that sends information in one direction only

Which indicates that the computers can communicate directly with each other?

A line between two computers indicates that the computers can communicate directly with each other

In which configuration is it NOT possible to have redundant routing between computers P and S?

Why does communication between a computer and a keyboard involve simplex transmission?

Communication between a computer and a keyboard involves simplex transmission because here data flows in a single direction

Simplex transmission is a type of transmission mode

In this type of transmission mode, data can be sent only through one direction i

e communication is unidirectional

We cannot send a message back to the sender