LOM(1) Short for LAN on motherboard. The term refers to a chip or chipset capable of network connections that has been embedded directly on the motherboard of a desktop, workstation or server. Instead of requiring a separate network interface card to access a local-area network, such as Ethernet, the circuits are attached to the motherboard. An advantage of a LOM system is an extra available PCI slot that is not being used by the network adapter.
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