Networking tutorial for beginer and advanced user

 

Introduction to network

Network is collection of computers connected to each other. It allows the computer to communicate with each other. Computers connected in network can share resources which include information, software and peripheral device.

Advantage of Network

It enables users to share hardware like scanner and printers. This reduces costs by reducing the number of hardware item bought. It allow users to access data stored on other computers. It can allow user to run program installed on other computer in network.

Disadvantage of network

Accessing anything over network is slower then accessing the same thing on your own computer. Network is more complex so more problem to handle that.

History of computer Networks

The Advanced Research Projects Agency Network (ARPANET) Developed by United states Department of Defense was the world’s first operational network, and the predecessor of the global internet.

It was established in 1969. ARPANET served as a test bed for new networking technologies, Linking many universities and research centers.

The first two nodes that formed the ARPANET were UCLA (university of California at loss Angeles) and the Stanford Research Institute, followed shortly thereafter by the University of Utah

Types Of computer Networks

There are different types of computer network for different uses and purposes here are a detail of few of them that are most important to learn.

LAN

A LAN is local Area Network. This would include networks where the computers are relatively close together. LANs would be within the same office, a single building or several building closer to each other.

WAN

WAN covers a large geographical area. WANs are mostly used lease line or public phone lines as there back bone. It is also known as Wide Area Network

W LAN

A LAN based on WiFi wireless network technology is known as WLAN or Wireless Local Area Network. WLAN provide wireless network connectivity to laptop and desktop computers.

MAN

Metropolitan Area Network - a network spanning a physical area larger than a LAN but smaller than a WAN, such as a city. A MAN is typically owned and operated by a single entity such as a government body or large corporation.

Campus Area Network - a network spanning multiple LANs but smaller than a MAN, such as on a university or local business campus.

All the communication over a Network work on a well adopted model that is known as OSI model

I will talk about OSI model in my next post