A LAN is a Local Area Network. Local is generally referred to a network contained within a building or an office or a campus. You might have a LAN for example on a University campus or between office blocks in an office park.
A big corporate perhaps like Anglo American, would generally have a LAN that might span several buildings. To set up a LAN -relatively speaking- is cheap. If you want to put an extra couple of network points or an extra couple of devices on the network
A WAN is generally slow. If we compare that to a LAN, we said that Ethernet could run up to 1000 Mbps, currently, certainly in South Africa Pretoria and one in Johannesburg
LAN
LAN (Local Area Network) is a computer network covering a small geographic area, like a home, office, or group of buildings
Network in an organization can be a LAN
Typically owned, controlled, and managed by a single person or organization
Typically owned, controlled, and managed by a single person or organization
LANs have a high data transfer rate
Have a small geographical range and do not need any leased telecommunication lines one LAN can be connected to other LANs over any distance via telephone lines and radio waves
WAN
WAN (Wide Area Network) is a computer network that covers a broad area (i.e., any network whose communications links cross metropolitan, regional, or national boundaries
Internet is the best example of a WAN
WANs (like the Internet) are not owned by any one organization but rather exist under collective or distributed ownership and management
WANs tend to use technology like ATM, Frame Relay and X.25 for connectivity over the longer distances
WANs have a lower data transfer rate as compared to LANs
Have a large geographical range generally spreading across boundaries and need leased telecommunication lines
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
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