Lan, which stands for local area network, and wan, which stands for wide area network, are two types of networks that allow for interconnectivity between computers. Below image shows a small local area network lan connected together. The network allows computers to connect and communicate with different computers via any medium. Fig 1 gives an example of a network in a school comprising of a local area network or lan connecting computers with each other, the internet, and various servers. Forwards a packet to all outgoing links except the originated link 37. Local area network lan a local area network lan is a network that is restricted to smaller physical areas e. Local area network lan a lan is a network of computers that are in the same. Computer networks pdf notes free download cn notes. Routers do the majority of the hard work on a network they make the decisions about all the messages that travel on the network, and whether to pass messages to and from outside networks. There are some similarities and dissimilarities between them. A wan wide area network is a communications network that spans a large geographic area such as across cities, states, or countries. A man is typically owned and operated by a single entity such as a government body or large corporation.
A computer network consists of a collection of computers, printers and other equipment that is connected together so that they can communicate with each other. All hard to work with compared with star topology twisted pair. Understanding how these networking devices operate and. Local area network lan communications installation guide. Backbone the backbone is the main cabling of a network that all of the segments connect to.
In lan all machines are connected to a single cable. Most indiana university bloomington departments are on lans. It describes how to set up your hp all inone in a network, which includes configuring and connecting the device, and installing the software. That is, one network can be connected to another network and become a more powerful tool because of the greater resources. A lan is composed of interconnected workstations and personal computers which are each capable of accessing and sharing data and devices, such as printers. All the networks which the project has used clusterone and plan. A network refers to two or more connected computers that can share resources such as data, a printer, an internet connection, applications, or a combination of these. Local area networks lan and wide area networks wan. An overview of wireless local area networks wlan ibrahim al shourbaji computer networks department jazan university jazan 828226649, saudi arabia abstract wireless communication is an application of science and technology that has come to be vital for modern existence. A local area network lan is a number of computers and computer peripherals disc. Network interface card, one of the main computer network components, comes with different speeds, 10mbps, 100mbps, and mbps, so on. Approximately all current lans whether wired or wireless are based on ethernet. Client serve network are defined by the presence of servers on. Access point a wireless access point ap is a hardware device that allows wireless communication.
Local area network lan communications security is addressed in this essay. Local area network lan communications installation guide 6820 accessory g4325a lan overview these instructions provide the procedure for adding a local area network lan communications interface to an agilent 6820 gas chromatograph hereafter referred to as the gc. An introduction to local area networks research mit. But if youre having trouble accessing other computers on your network, you can use the route command to make sure the entries in the routing table are correct. Each lan segment consists of all the devices attached to a single switch portthe switch stops packets from different ports from colliding with each other. List of computer network components allaboutcomputer. The lan itself is referred to as a broadcast domain, because if any device within the lan sends out a broadcast packet, it will be transmitted to all devices in that lan, but not to. Different types of topologies such as star, tree, bus, ring, etc can be.
Description of the lan topologydescription of the wan topologydescription of the network connectors such as routers, bridges. Recent standard network cards built with gigabit mbps connection speed. And that will leave your network wide open to intruders. All three of these devices reside at the physical layer because they do nothing. All but the most basic of networks require devices to provide connectivity and functionality. A local area network may serve as few as two or three users in a homeoffice or several hundred users in. Geographical locations of the different components or subnets involved in the network.
Local area network lan wide area network wan you may also see references to a metropolitan area networks man, a wireless lan wlan, or a wireless wan wwan. Because only one high speed internet connection is purchased by a net cafe from any isp. A man is optimized for a larger geographical area than a lan, ranging from several blocks of buildings to entire cities. All devices connected arbitrarily using all previous ways to connect each other, resulting in a hybrid structure. Local area networks lan local area network lan is a computer network, which is limited to a small office, single building, multiple buildings inside a campus etc. Ethernet is a local area network technology with end stations assigned unique 48bit addresses. Principles, protocols and practice, release techniques allow to create pointtopoint links while radiobased techniques, depending on the directionality of the antennas, can be used to build networks containing devices spread over a small geographical area. From the early radio and telephone to current devices such as. As the naming conventions suggest, lans are for smaller, more localized networking in a home, business, school, etc. Advantages and disadvantages of lan local area network. All modern laptop computers incorporated wireless nic in addition to the wired adapter. A lan local area network is a group of computers and network devices connected together, usually within the same building. Typically, a local area network lan is a private network owned and maintained by a single organization.
In net cafes, single internet connection sharing system keeps the internet expenses cheaper. The computers on a network may be linked through cables, telephone lines, radio waves, satellites, or infrared light beams. Local area network lan is based on client server network relationship. By definition, the connections must be high speed and relatively inexpensive e. A network spanning a physical area larger than a lan but smaller than a wan, such as a city. When bridges were introduced, the mac addresses of the devices on the connected networks had to be entered. A local area network lan is a group of computers and peripheral devices that share a common communications line or wireless link to a server within a distinct geographic area. Typically, the backbone is capable of carrying more information than the individual segments. Connecting your hp all inone to a network enables you to share your hp all inone and. One layer above the physical layer is the data link layer. One way is to organize it as a clientserver model, and another way.
Data communication and computer network 2 all devices connected together with a single device, creating starlike structure. In b each host needs only one and the local area network. They can be private to connect parts of a business or they can be more public to connect smaller networks together. Forwards a packet to the next free outgoing link c. Every new technology goes through the tweakandfiddle stage. Networking basics how lan switches work howstuffworks. Lan local area network cisco computer information system company arp. Determines on which outing link a packet is to be forwarded d. A wireless local area network wlan is a type of local area network that uses high frequency radio waves rather than wires to communicate between network enabled devices.
A local area network lan is a computer network that interconnects computers within a limited area such as a residence, school, laboratory, university campus or office building. Local area network provides the facility to share a single internet connection among all the lan users. This guide also provides examples of recommended networks, network management information, and troubleshooting tips. Plc communication schemethe local area networkand the role it plays. Metropolitan area network man a metropolitan area network man is a large computer network that usually spans a city or a large campus. It is also easy to provide broadcast communication to all nius by using a. A good network security system will help you to remove the temptations open ports, exploitable. Pdf lasisi basic design of a local area network for. The local area network lan was created to connect computers in a single office or. A clientserver network is one n which all available network resources such as files, directories, applications and shared devices, are centrally managed and hosted and then are accessed by client.
By contrast, a wide area network wan not only covers a larger geographic distance, but also generally involves leased telecommunication circuits. When the network is working properly, you should be able to use it without thinking about all of that internal plumbingjust click a few icons and youre connected. Pdf networking is referred as connecting computers electronically for the purpose of sharing information. Administration from an administrators point of view, a network can be private network which. Lan, man and wan are the three major types of the network designed to operate over the area they cover. A local area network lan is a computer network within a small geographical area such as a home, school, computer laboratory, office building or group of buildings.
The specification of the network topology diagram requires the definition of the characteristics and entities underlying the network. What is the difference between a lan, a man, and a wan. Types of area networks lan, man and wan geeksforgeeks. Components of a local area network like any other data communication network, a local area network is composed of three basic hardware elements. Bridges can also be used to connect two physical lans into a larger logical lan. Local area network lan high speed, privately owned, short range network ieee 802. Introducing basic network concepts 3 basetech networking concepts team 2230894 blind folio 3.
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