how does LAN/WAN related and connected to the internet?

Answer 1

Well a LAN (local area network) and a WAN (wide area network) are two sides of the network world. Local is just that the local machines to the local network.

Wide area (which usually includes the internet) covers the area outside the local network.

Answer 2

My own personal definition, not to impose my viewpoints on anyone else, is as follows:

A LAN (Local Area Network) is a network that exists without crossing into other networks. Such as having a router at home, with a few computers connected directly to it. These computers would be considered part of a LAN. The other side of the router connects to the phone line for the internet, and this is considered outside the LAN.

A WAN (Wide Area Network) is one that connects dissimilar networks. That is it includes the router, and the computers on the other side of the router. So your LAN, along with the computers connected beyond your router, would be considered a WAN.

The terms are by no means absolute, and peoples' definitions vary. This is just me trying to put some logic to relatively obscure definitions.

Answer 3

the internet is just lots of wans connected togeather. the difference between a lan and wan is the geographical area they are spread over

Answer 4

LAN

A local area network is a computer network covering a small geographic area, like a home, office, or group of buildings.[1] Current LANs are most likely to be based on switched IEEE 802.3 Ethernet technology, running at 10, 100 or 1,000 Mbit/s, or on IEEE 802.11 Wi-Fi technology. Each node or computer in the LAN has its own computing power but it can also access other devices on the LAN subject to the permissions it has been allowed. These could include data, processing power, and the ability to communicate or chat with other users in the network.[2]

The defining characteristics of LANs, in contrast to WANs (wide area networks), include their much higher data transfer rates, smaller geographic range, and lack of a need for leased telecommunication lines.

Wide Area Network (WAN) is a computer network that covers a broad area (i.e., any network whose communications links cross metropolitan, regional, or national boundaries [1]). Or, less formally, a network that uses routers and public communications links [1]. Contrast with personal area networks (PANs), local area networks (LANs), campus area networks (CANs), or metropolitan area networks (MANs) which are usually limited to a room, building, campus or specific metropolitan area (e.g., a city) respectively. The largest and most well-known example of a WAN is the Internet.

WANs are used to connect (LANs) and other types of networks together, so that users and computers in one location can communicate with users and computers in other locations. Many WANs are built for one particular organization and are private. Others, built by Internet service providers, provide connections from an organization's LAN to the Internet. WANs are often built using leased lines. At each end of the leased line, a router connects to the LAN on one side and a hub within the WAN on the other. Leased lines can be very expensive. Instead of using leased lines, WANs can also be built using less costly circuit switching or packet switching methods. Network protocols including TCP/IP deliver transport and addressing functions. Protocols including Packet over SONET/SDH, MPLS, ATM and Frame relay are often used by service providers to deliver the links that are used in WANs. X.25 was an important early WAN protocol, and is often considered to be the "grandfather" of Frame Relay as many of the underlying protocols and functions of X.25 are still in use today (with upgrades) by Frame Relay.

Academic research into wide area networks can be broken down into three areas: Mathematical models, network emulation and network simulation.

Such a network generally requires the crossing of public right-of-ways, and relies at least in part on circuits provided by a common carrier. Typically, a WAN consists of a number of interconnected switching nodes. A transmission from any one device is routed through these internal nodes to the specified destination device. These nodes (including the boundary nodes) are not concerned with the contents of data; rather their purpose is to provide a switching facility that will move the data from node to node until they reach their destination. Performance improvements are sometimes delivered via WAFS or WAN Optimization.

Thanks
-- Ashik

Answer 5

here's some article to read on:


http://www.webopedia.com/TERM/l/local_area_network_LAN.html

http://www.webopedia.com/TERM/W/wide_area_network_WAN.html

http://en.wikipedia.org/wiki/Local_area_network

hope this help you.

Answer 6

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