Networking & Internet
Gateway
Definition
In a computer network, a gateway is a node that serves as a connection point from one network to another. It is the device that routes traffic from a local network to devices on other networks.
Why It Matters
The gateway is your local network's "exit door" to the rest of the world. Any traffic that is not destined for another device on your LAN is sent to the gateway to be routed elsewhere.
Contextual Example
In a typical home network, the router's IP address (e.g., `192.168.1.1`) is the default gateway for all the connected devices. When you want to visit a website, your computer sends the packets to the router.
Common Misunderstandings
- The gateway device is almost always a router.
- The default gateway address is a crucial piece of information provided by DHCP.