CompTIA Network+ Practice Test

What characterizes a site-to-site VPN?

1. Utilizes TLS handshake for security

2. Only active when devices connect

3. Is always (or almost always) on

4. Requires separate software for each connection

The correct answer is: Is always (or almost always) on

A site-to-site VPN is predominantly characterized by its constant connection between two networks, which makes option C the most accurate representation of its functionality. In a site-to-site VPN, the connection remains active, allowing secure communication between the networks of multiple locations without the need for individual devices to initiate the connection each time they need to exchange data. This 'always-on' capability is particularly beneficial for organizations with multiple branches, as it facilitates seamless internal communication. In regard to the other options, a site-to-site VPN does not typically rely on a TLS handshake for its security, which is more relevant to client-to-site VPN configurations. The nature of a site-to-site VPN also means it is not contingent on individual device connections—once set up, the VPN operates independently of the devices, allowing for continuous networking between locations. Additionally, the requirement for separate software for each connection pertains more to specific user configurations rather than the robust, directed nature of site-to-site architectures. Overall, the always-on characteristic strengthens the reliability and efficiency in inter-network communications that site-to-site VPNs provide.