EnoughNetworkingToBeDangerous

When outside the organizations local network, if there are services that
should be accessible because they can perform well over the internet, a
secure connection can be established with what's called a Virtual Private
Network. A hardware appliance can set that up, or again, a server with
standard directory services can use that user database to provide
authentication when folks connect. After they're allowed in, DHCP takes over
according with the subnet it's configured to give access to.
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