Types of Computer Network

 Computer Network Types

• A computer network is a group of computers linked to each other that enables the computer to communicate with another computer and share their resources, data, and applications.
• A computer network can be categorized by their size. 

A computer network is mainly of four types:

Figure : Types of Computer Network

1. LAN(Local Area Network)
2. PAN(Personal Area Network)
3. MAN(Metropolitan Area Network)
4. WAN(Wide Area Network)

LAN(Local Area Network)

• Local Area Network is a group of computers connected to each other in a small area such as building, office.
• LAN is used for connecting two or more personal computers through a communication medium such as twisted pair, coaxial cable, etc.
• It is less costly as it is built with inexpensive hardware such as hubs, network adapters, and ethernet cables.
• The data is transferred at an extremely faster rate in Local Area Network.
• Local Area Network provides higher security.

Figure : Local Area Network

Personal Area Network (PAN)

• Personal Area Network (PAN) is a the computer network that connects computers/devices within the range of an individual person. 
• As PAN provides a network range within a person’s range typically within a range of 10 meters(33 feet) it is called as Personal Area Network. 
• A Personal Area Network typically involves a computer, phone, tablet, printer, PDA (Personal Digital Assistant) and other and other entertainment devices like speakers, video game consoles etc. 

Figure : Personal Area Network

Metropolitan Area Network (MAN) –

• MAN or Metropolitan Area Network covers a larger area than that of a LAN and smaller area as compared to WAN. 
• It connects two or more computers that are apart but reside in the same or different cities. 
• It covers a large geographical area and may serve as an ISP (Internet Service Provider). 
• MAN is designed for customers who need high-speed connectivity. 
• Speeds of MAN range in terms of Mbps. It’s hard to design and maintain a Metropolitan Area Network.

Figure : Metropolitan  Area Network

WAN(Wide Area Network)

• Wide Area Networks are a form of telecommunication networks that can connect devices from multiple locations and across the globe. 
• WANs are the largest and most expansive forms of computer networks available to date.
• These networks are often established by service providers that then lease their WAN to businesses, schools, governments or the public.
•  These customers can use the network to relay and store data or communicate with other users, no matter their location, as long as they have access to the established WAN. 
• Access can be granted via different links, such as virtual private networks (VPNs) or lines, wireless networks, cellular networks or internet access.

Figure : Wide Area Network