Default route: Basic topology of a LAN (Local Area Network).

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## 1. Basic topology of a LAN (Local Area Network).

A LAN is generally a set of machines sharing a common Ethernet network. Quite often, several separate LANs are connected together using one or more routers. One simple and effective router is a Linux system with two Ethernet adaptors.

If there is only one gateway connecting your LAN to other LANs or even the Internet, setting the default route to the IP address of this gateway is a safe bet.

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