The hardware components present inside a computer are called internal hardware. The descriptions of some of the internal components are given below:

(a) This device is one of the most useful, reliable and popular secondary storage devices that consists of a number of circular metallic plates coated with iron oxide.

(b) This component is a small box placed at the back of a computer's cabinet that provides regulated power to the computer system.

(c) This component is the printed circuit board that contains processor, Integrated Circuit (IC) chips, memory devices and other hardware components.

(d) They are the connecting nodes used to connect the peripheral devices with the processor.

Identify and write the names of the devices described above in (a), (b), (c) and (d).

(a) Hard Disk

(b) Switched-Mode Power Supply (SMPS)

(c) Motherboard

(d) Communication Ports