Which statement best describes the encryption layer and typical use cases for IPsec VPNs compared to SSL/TLS VPNs?

• A. IPsec VPNs operate at the network layer (site-to-site or client-to-site); SSL/TLS VPNs operate at the application layer for remote access via browser.
• B. IPsec VPNs operate at the transport layer; SSL/TLS VPNs operate at the network layer for site-to-site connections.
• C. IPsec VPNs use only UDP; SSL/TLS VPNs use only TCP.
• D. IPsec VPNs are clientless; SSL/TLS VPNs require dedicated VPN clients.

Answer: (A)