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# Default route

## Introduction

Once you have filled the "basic host information" form, your Linux system knows how to send packets to other `TCP/IP` machines on your network. That's it. If you try to send packets to a host (another computer) on a different Ethernet network, it won't work unless you tell the system which gateway is suitable to reach the other network.

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

## 2. When not to use a default route

## 3. The default route is checked last anyway

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