CISSP Question #300: Real Exam Question with Answer & Explanation

The correct answer is D: Transport Layer Security (TLS). While SHA itself is not responsible for the end-to-end encryption, it's part of the IPSec protocol suite that ensures integrity and security. IPSec, in combination with L2TP, generally provides the end-to-end security you're referring to in this case, as it handles confidentialit

Submitted by ngozi_ng· Mar 5, 2026Communication and Network Security

Question

Which of the following adds end-to-end security inside a Layer 2 Tunneling Protocol (L2TP) Internet Protocol Security (IPSec) connection?

Options

ATemporal Key Integrity Protocol (TKIP)
BSecure Hash Algorithm (SHA)
CSecure Shell (SSH)
DTransport Layer Security (TLS)

Explanation

While SHA itself is not responsible for the end-to-end encryption, it's part of the IPSec protocol suite that ensures integrity and security. IPSec, in combination with L2TP, generally provides the end-to-end security you're referring to in this case, as it handles confidentiality, authentication, and integrity. Therefore, SHA plays a role in the security aspect but isn't fully responsible by itself for end-to-end encryption.

Topics

#L2TP/IPSec#TLS#VPN#end-to-end encryption#protocol security

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