A LAN (local area network) connects the devices in one location, such as an office or a plant, and a WAN (wide area network) links several LANs separated by distance, for example a company's branches with each other and the cloud. The LAN is usually company-owned and fast; the WAN relies on links contracted from carriers.
How TecnetOne handles it: Network Monitoring
local area network, wide area network, LAN vs WAN