CompTIA Network+ (N10-009) — Question 405

Which of the following is the most cost-effective way for a network administrator to establish a persistent, secure connection between two facilities?

Answer options

Correct answer: A

Explanation

A Site-to-site VPN is the most cost-effective solution because it utilizes the existing internet infrastructure to create a secure connection without the need for additional physical lines. In contrast, a GRE tunnel is primarily used for encapsulation and does not inherently provide security. VXLAN is more suited for data center environments and dedicated lines involve significant costs due to the requirement for physical infrastructure.