Which technology allows a private network to be securely extended over public networks?

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A network confined to a small geographic areaA secure network connection over a public infrastructureA private network used within a large organizationA network dedicated to data storage devices

Explanation

A local area network (LAN) covers a limited area such as a home or office. An enterprise private network connects various locations of a company internally. A storage area network (SAN) is designed for data storage. A virtual private network (VPN) enables a private network to be securely extended over public networks, providing encrypted communication.