Task 1

Networking Basics

What is a network?

Its time to discuss what a network is and learn about the the different types of networks according to topology or geographical restrictions.

A computer network (also simply called a network) is a group of two or more computers and other devices (like printers, mobile phones and tablets ) that are linked through cables, fiber channels or wireless technologies ( infrated, radio waves, satellites, etc.). The computers and hardware devices that are connected in a network are called "nodes". Network nodes communicate with each other in order to exchange data, files and messages and also to share devices .

Network topologies

The way in which computers are 

interconnected is called network topology.

The most commonly used topologies are:

Point to point This is the simplest topology

there is and consists of a permanent link

between two nodes. Conventional analog telephony

uses point-to-point  circuit can be set up dynamically

(for as long as i needed) and when it is no longer used,

it can be dropped .

Bus topology Each node is connected to 

single cable.

Network categories

Networks are also slit into categories,

concerning the geographical distance between 

the connected devices.

To be specific, there are Local Area Networks 

(LANs) and Wide Area Networks (WANs).

A LAN interconnectes computers that are in a 

small area, such as home, and office, etc.

A WAN covers a broader area tha may exceed a country's border. For

example, the Internet is type of WAN.

The Client-Server model

A network consists of two or more interconnected computers.

As a network gets bigger, it supports more tasks and the workload

increases. In order to partition the tasks and other workload, each computer 

in network must have a specific role.

The client-server model works as a distributed  application, where some computers operate as servers and others as clients. Think of  a shop, where there are assistants and customers. The costumers have

requests