Virtual private network is correct because it spans a private network across the public internet so that remote users operate as though they are on the internal network.

A Virtual private network or VPN accomplishes this by creating an encrypted tunnel between the remote device and the corporate network and by authenticating the user or device. The tunnel protects data in transit and allows assignment of internal addressing or routing so remote endpoints can access internal resources securely.

Domain Name System Security Extensions is incorrect because DNSSEC provides integrity and origin authentication for DNS data. It does not provide a secure tunnel or remote access to an internal network.

Virtual local area network is incorrect because a VLAN segments traffic within a local or switched network. It does not span the public internet to connect remote users to an internal network.

VPC network peering is incorrect because peering links cloud virtual private clouds or networks together for internal cloud traffic. It is not a mechanism for remote users on the public internet to appear as if they are on an internal corporate network.

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