(Note) Difference between gateway and default gateway

It can be said that it is different, and it can be said that there is no difference.

A gateway is an exit (router) to another network. The default gateway is the gateway used when the route is unknown (default route).

In terms of server-side settings, specifying a gateway is usually only the default gateway, so specifying a gateway is often synonymous with specifying a default gateway (should).

There is also an OS that specifies as an alternative path to switch when a failure occurs in a gateway that has multiple default gateways.

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