CompTIA Network+ (N10-007) — Question 367

Which of the following creates a secure remote connection at the OSI network layer?

Answer options

• A. L2TP
• B. SSL
• C. DTLS
• D. IPSec

Correct answer: D

Explanation

IPSec is designed specifically for securing Internet Protocol communications by authenticating and encrypting each IP packet in a communication session, thus operating at the OSI network layer. L2TP is mainly a tunneling protocol and does not provide encryption on its own, SSL operates at the transport layer, and DTLS is designed for datagram transport security, which is also not at the network layer.