Which VPN model is the least used and typically employed for remote management of servers by system administrators?

• A. Host-to-Host
• B. Client-to-Site
• C. Site-to-Site
• D. Remote Access

Answer: (A)

VPN models differ in who creates the tunnel and how broad the access is. A host-to-host VPN creates a direct tunnel between two devices alone. That one-to-one setup can work for a very specific, tightly controlled task, but it doesn’t scale. For system administrators who need to manage many servers or provide access to a network from multiple locations, maintaining a separate tunnel for every pair of devices becomes unwieldy, and centralized control, policy enforcement, and auditing are hard to achieve without a gateway or central management point. That’s why remote access (client-to-site) and site-to-site VPNs are preferred for remote server management: they offer scalable, centralized authentication and access control, and they support managing many users and devices through a single point. In practice, the direct host-to-host model is the least common choice for admin remote management.