Explain different types of computer networks with example.
Answers
Explanation:
Computer network, two or more computers that are connected with one another for the purpose of communicating data electronically. Besides physically connecting computer and communication devices, a network system serves the important function of establishing a cohesive architecture that allows a variety of equipment types to transfer information in a near-seamless fashion. Two popular architectures are ISO Open Systems Interconnection (OSI) and IBM’s Systems Network Architecture (SNA).
Two basic network types are local-area networks (LANs) and wide-area networks (WANs). LANs connect computers and peripheral devices in a limited physical area, such as a business office, laboratory, or college campus, by means of links (wires, Ethernet cables, fibre optics, Wi-Fi) that transmit data rapidly. A typical LAN consists of two or more personal computers, printers, and high-capacity disk-storage devices called file servers, which enable each computer on the network to access a common set of files. LAN operating system software, which interprets input and instructs networked devices, allows users to communicate with each other; share the printers and storage equipment; and simultaneously access centrally located processors, data, or programs (instruction sets). LAN users may also access other LANs or tap into WANs. LANs with similar architectures are linked by “bridges,” which act as transfer points. LANs with different architectures are linked by “gateways,” which convert data as it passes between systems.
WANs connect computers and smaller networks to larger networks over greater geographic areas, including different continents. They may link the computers by means of cables, optical fibres, or satellites, but their users commonly access the networks via a modem (a device that allows computers to communicate over telephone lines). The largest WAN is the Internet, a collection of networks and gateways linking billions of computer users on every continent.
Answer:
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.
PAN(Personal Area Network)
<>Personal Area Network is a network arranged within an individual person, typically within a range of 10 meters.
<>Personal Area Network is used for connecting the computer devices of personal use is known as Personal Area Network.
<>Thomas Zimmerman was the first research scientist to bring the idea of the Personal Area Network.
<>Personal Area Network covers an area of 30 feet.
<>Personal computer devices that are used to develop the personal area network are the laptop, mobile phones, media player and play stations.
MAN(Metropolitan Area Network)
<>A metropolitan area network is a network that covers a larger geographic area by interconnecting a different LAN to form a larger network.
<>Government agencies use MAN to connect to the citizens and private industries.
<>In MAN, various LANs are connected to each other through a telephone exchange line.
<>The most widely used protocols in MAN are RS-232, Frame Relay, ATM, ISDN, OC-3, ADSL, etc.
<>It has a higher range than Local Area Network(LAN).