A network administrator is adding a new switch to the network. Which of the following network hardening techniques would be BEST to use once the switch is in production?
You wouldn't want to disable port security, as that is the feature on switches that block unauthorized connections to switches based on the connecting device's MAC address.
Answers B and C also decrease security. Answer B would disable SSH, the protocol used to securely console into a remote device. Answer C is essentially port security, but it is not really security because anyone can spoof MAC addresses.
A:
Disabling unused ports can stop a bad guy from plugging a malicious device into an unused port and getting unauthorized access to the network. It can also help train users—especially those in remote offices—to call IT before moving things around. After a few go-rounds of plugging a computer into an empty port and having it not work, most people will take the hint that they need to call IT first.
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