Computer Networking Fundamentals

Network:  A network is a group of some computer or other devices interconnected with each other to share data and other resources. All the connected systems are known as"Node". A medium is required to connect all devices into a network. The medium may be wired or wireless.

Wired Network

In wired network computer or other devices are interconnected by a wired medium such as a LAN cable or a data cable.

Wired Network

Wireless Network

In a wireless network computer or other devices are interconnected by a wireless medium such as Wi-Fi or Bluetooth.

Wireless Network

There are many types of networks in computer networking technology.

following diagram can help to explain how network is different to other network:

Different types of networks

There are different types of network available, we can classify them to different category.

PAN (Personal Area Network) 

Personal area network connect our computer & other personal devices such as mobile, laptop, other media devices  in a very small area such as a home for personal use.

LAN (Local Area  Network)

A local area network connect computer & other devices in a small geographical area such as office, school etc. LANs are also owned, controlled, and managed by a single person or organization.

MAN (Metropolitan Area Network)

A network connecting a physical area larger than a LAN but smaller than a WAN, such as a city or different branch offices. A MAN is typically owned and operated by a single entity such as a government body or large corporation.

WAN (Wide Area Network)

A WAN is a collection of LANs & MANs. A WAN connect a large physical distance. The Internet is the largest WAN, spanning the Earth. Most WANs (like the Internet) are not owned by any one organization.

SAN (Storage Area Network)

A Storage Area Network is a type of LAN designed to handle large data transfers and bulk storage of digital information. A SAN typically supports data storage, retrieval and replication on business networks.

some other networks are VPN (Virtual Private Network) and CAN (Campus Area Network)

You can downloads these notes from my Google drive:

https://drive.google.com/open?id=0B6Ov-Oe4YuYUckMtaGh3YTg3cDA