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What is a VPN?

It's a type of router that's used by large enterprises. A massive series of firewalls is configured within that type of router, and they're always plugged into a UPS (uninteruptable power supply.)

It's a type of fiber-optic cable connection.

It's a way that one can access a LAN via an external network such as the internet, while being heavily secured, so that sensitive data in the internal network isn't leaked into an external network by unauthorized users.

It's a WiFi encryption standard.

Explanation

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