Computer Network

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Computer Network

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Table of Contents




Functions of Processor3

Types of computer processors4



Computer Memory6

Types of Memory6

ROM Hard Disk and Floppy Disk8

CD-ROM-CD-ROM stands for Compact Disk-Read Only Memory8

Input Devices10




Output Devices11

Different Types of Monitors12


Support Devices14


Network Cabling14

Fiber Optic Cable15

Wireless LANs15

IP Addresses15

Routing Protocol17



Computer Network


Computer network is basically a collection of computers and various hardware that are all interconnected by means of communication channels which facilitates share of information and resources. In one device at least one process is able to receive or send data from at least one process in a remote device. Then two devices are then said to be in a network. A group of devices that are connected to each other is termed as a computer network. Network can be categorized into a number of characteristics like a medium for transporting the data, topology, scale, communications protocol used, benefits and organizational scope (Abd-El-Barr and El-Rewini,2005,pp.89-97).



The term computer processor refers to a small chip which is made up integrated circuit. A processor in computer is usually made of silicon. Inside the central processing unit is a circuit board which is known as mother board. The processor is fixed on the motherboard of the computer. Currently processors are square in shape and consist of 240 pins. It deals with all sorts of processing peripherals.

Functions of Processor

The main functions of processor are as follows:

Fetch program code-The function of the processor is to fetch the instructions from the program code that is stored in the memory. In order to execute the instructions faster, these are stored in the cache memory. Most of the processors have cache memory up to 4MB.

Decode the instruction-Instruction which is fetched is in higher level programming language and it is necessarily required for it to be converted into assembly language or machine language for execution.

Execute the instruction- It is considered as the most significant function of a computer processor. During this function, binary digits are received as input and then operation is performed on them according to the indications given by the instruction and then output is returned. On data inputs, logical or arithmetic operations are performed by the processor.

Store/ write-back results-The results of the operation performed in execute function are stored in the secondary memory location or main memory at CPU's internal registers by the address mentioned in the instruction Parsons and Oja, 2009, pp.1032-121).

Types of computer processors

With the technological advancement and innovation in chip, there are several emerging types of processor being implemented in computers. Some of them are:

Single core processor: It consists of a single processing unit. At a time, it can only perform a single operation. It is mainly used in small devices and toys that do not have much processing to perform.

Dual core processor: This technology is recently implemented by Intel in their processors. In a single package, these processors have two different processing units. The two cores can be located on different mother board or on a same motherboard.

Quad-core processor: This processor is manufactured by Intel and AMD. Quad core processor is ...
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