COMPUTER NETWORKS

PAN is the most basic type of computer network. This network is restrained to a single person, that is, communication between the computer devices is centred only to an individual’s work space. PAN offers a network range of 10 meters from a person to the device providing communication.Examples of PAN are USB, computer, phone, tablet, printer, PDA, etc.

LAN is the most frequently used network. A LAN is a computer network that connects computers together through a common communication path, contained within a limited area, that is, locally. A LAN encompasses two or more computers connected over a server. The two important technologies involved in this network are Ethernet and Wi-fi. Examples of LAN are networking in a home, school, library, laboratory, college, office, etc.

WAN is a type of computer network that connects computers over a large geographical distance through a shared communication path. It is not restrained to a single location but extends over many locations. WAN can also be defined as a group of local area networks that communicate with each other. The most common example of WAN is the Internet.

WLAN is a type of computer network that acts as a local area network but makes use of wireless network technology like Wi-Fi. This network doesn’t allow devices communicating over physical cables like in LAN, but allows devices to communicate wirelessly. The most common example of WLAN is Wi-Fi.

CAN is bigger than a LAN but smaller than a MAN. This is a type of computer network which is usually used in places like a school or college. This network covers a limited geographical area that is, it spreads across several buildings within the campus.Examples of CAN are networks that cover schools, colleges, buildings, etc.

A MAN is larger than a LAN but smaller than a WAN. This is the type of computer network that connects computers over a geographical distance through a shared communication path over a city, town or metropolitan area. Examples of MAN are networking in towns, cities, a single large city, large area within multiple buildings, etc

SAN is a type of computer network that is high speed and connects groups of storage devices to several servers. This network does not depend on LAN or WAN.. Instead, a SAN moves the storage resources from the network to its own high-powered network. A SAN provides access to block-level data storage.Examples of SAN are a network of disks accessed by a network of servers.

A SAN is a type of computer network that connects a cluster of high performance computers. It is a connection-oriented and high bandwidth network. A SAN is a type of LAN that handles high amounts of information in large requests. This network is useful for processing applications that require high network performance. Microsoft SQL Server 2005 uses SAN through virtual interface adapter.

A POLAN is a type of computer network which is an alternative to a LAN. POLAN uses optical splitters to split an optical signal from a single strand of single mode optical fibre to multiple signals to distribute users and devices. In short, POLAN is a point to multipoint LAN architecture. 

EPN is a type of computer network mostly used by businesses that want a secure connection over various locations to share computer resources. 

A VPN is a type of computer network that extends a private network across the internet and lets the user send and receive data as if they were connected to a private network even though they are not. Through a virtual point to point connection users can access a private network remotely. VPN protects you from 

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A router is a connecting device thattransfers data packets between differentcomputer networks. Typically, they areused to connect a PC or an organization’sLAN to a broadband internet connection.They contain RJ-45 ports so thatcomputers and other devices can connectwith them using network cables.

A repeater receives a signal and regenerates it before re-transmittingso that it can travel longer distances.

A hub is a multiport repeater having several input/output ports, so thatinput at any port is available at every other port.

A switch receives data from a port, uses packet switching to resolve thedestination device and then forwards the data to the particular destination,rather than broadcasting it as a hub.