Lokalne racunarske mreze

Ова мрежа може да броји два и више рачунара који су повезани на одређен начин. Неки периферни уређаји као што су штампачи, модеми и сл., такође се убрајају у ову мрежу. Главна карактеристика локалних мрежа, по чему се оне разликују од мрежа на великим подручјима (WAN) јесте много већа брзина преноса података (реда 10 до 1000 MB/sec) и непостојање потребе за закупљеним телекомуникационим водовима.

Improve this chart LAN WAN Definition: LAN (Local Area Network) is a computer network covering a small geographic area, like a home, office, schools, or group of buildings. WAN (Wide Area Network) is a computer network that covers a broad area (e.g., any network whose communications links cross metropolitan, regional, or national boundaries over a long distance Speed: high speed(1000mbps) less speed(150mbps) Data transfer rates: LANs have a high data transfer rate WANs have a lower data transfer rate as compared to LANs Example: Network in an organization can be a LAN Internet is a good example of a WAN Technology: Tend to use certain connectivity technologies, primarily Ethernet and Token Ring WANs tend to use technology like MPLS, ATM, Frame Relay and X.25 for connectivity over the longer distances Connection: one LAN can be connected to other LANs over any distance via telephone lines and radio waves Computers connected to a wide-area network are often connected through public networks, such as the telephone system. They can also be connected through leased lines or satellites Components: layer 2 devices like switches, bridges. layer1 devices like hubs , repeaters Layers 3 devices Routers, Multi-layer Switches and Technology specific devices like ATM or Frame-relay Switches etc. Fault Tolerance: LANs tend to have fewer problems associated with them, as there are a smaller amount of systems to deal with. WANs tend to be less fault tolerant. as it consists of a large amount of systems there is a lower amount of fault tolerance. Data Transmission Error: Experiences fewer data transmission errors Experiences more data transmission errors as compared to LAN Ownership: Typically owned, controlled, and managed by a single person or organization WANs (like the Internet) are not owned by any one organization but rather exist under collective or distributed ownership and management over long distances Set-up costs: If there is a need to set-up a couple of extra devices on the network, it is not very expensive to do that In this case since networks in remote areas have to be connected hence the set-up costs are higher. However WANs using public networks can be setup very cheaply, just software (VPN etc) Geographical Spread: Have a small geographical range and do not need any leased telecommunication lines Have a large geographical range generally spreading across boundaries and need leased telecommunication lines Maintenance costs: Because it covers a relatively small geographical area, LAN is easier to maintain at relatively low costs. Maintaining WAN is difficult because of its wider geographical coverage and higher maintenance costs. Bandwidth: High bandwidth is available for transmission. Low bandwidth is available for transmission Geogdraphical Area: Lan covers 100 m Wan covers more than 100 m