A VPN (Virtual Private Network) creates a secure, encrypted connection over the internet between the user and a remote network, enabling secure access from home or public networks.
“VPNs provide a secure tunnel for transmitting data over unsecured networks, such as the internet, by encrypting all traffic between the client and the network.” — CompTIA ITF+ Security Topics
Other options:
A. LAN – Local and not for remote use
B. FTP – Transfers files but lacks modern encryption
C. DNS – Resolves domain names, not for access
Correct answer: D
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