Unused or “empty” ports within any network device pose a security risk, as someone might plug a cable into them and connect an unauthorised device to the network. This can lead to a number of issues, including:
- Network not functioning as it should
- Network information vulnerable to outsiders
This is why you should shut down every port that is not used on routers, switches, and other network devices. Depending upon the device, the shutdown state might be the default, but you should always verify this.
Shutting down a port is done with the shutdown . . .
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