Which statement describes a typical rationale for using a VPN?

Which statement describes a typical rationale for using a VPN?

• A. It uses the public Internet to connect private networks, reducing cost.
• B. It eliminates the need for any authentication.
• C. It guarantees the lowest possible latency in all cases.
• D. It replaces NAT on internal networks.

Answer: (A)

A VPN is used primarily to extend private networks over the public Internet in a secure, cost-effective way. It creates a protected tunnel so sites or remote users can access the corporate network as if they were directly connected, while encryption and authentication safeguard confidentiality and integrity. The cost benefit comes from using the public Internet instead of expensive private leased lines. The other ideas aren’t typical benefits: VPNs still require authentication, they don’t guarantee the lowest possible latency (they can add overhead), and they don’t replace NAT on internal networks.

A VPN is used primarily to extend private networks over the public Internet in a secure, cost-effective way. It creates a protected tunnel so sites or remote users can access the corporate network as if they were directly connected, while encryption and authentication safeguard confidentiality and integrity. The cost benefit comes from using the public Internet instead of expensive private leased lines. The other ideas aren’t typical benefits: VPNs still require authentication, they don’t guarantee the lowest possible latency (they can add overhead), and they don’t replace NAT on internal networks.