Enterprise Ethernet LAN also uses the same technologies and protocols to build the network, but on a much larger scale. An Enterprise Ethernet LAN can span in entire building, campus or even a large geographical area.

Unlike the SOHO network which usually connects a small number of computers, an Enterprise LAN network can connect a large number of computers. Basically, an Enterprise Ethernet LAN is the extended version of SOHO LAN. For, example there are five SOHO LANs. If we connect all of these LANs together to create a large LAN, we create an Enterprise Ethernet LAN.

Besides Ethernet LAN switches, based on requirements, several other networking devices such as the firewall and distribution switches are also used in the Enterprise LAN. Usually, these devices are used in the middle of traffic flow.

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For example, the following image shows a typical enterprise LAN spanned in four rooms. First three rooms have Ethernet LAN switches and the last room has a wireless LAN access point. To allow communication between all rooms, the switch of each room is connected to the centralized distribution switch. PC located in any room can send data to the PC located in another room, but its data will go through the distribution switch (SWD).