CISSP – Information Systems Security Architecture Professional (ISSAP) — Question 18

Peter works as a Network Administrator for Net World Inc. The company wants to allow remote users to connect and access its private network through a dial-up connection via the Internet. All the data will be sent across a public network. For security reasons, the management wants the data sent through the Internet to be encrypted. The company plans to use a Layer 2 Tunneling Protocol (L2TP) connection. Which communication protocol will Peter use to accomplish the task?

Answer options

• A. IP Security (IPSec)
• B. Microsoft Point-to-Point Encryption (MPPE)
• C. Pretty Good Privacy (PGP)
• D. Data Encryption Standard (DES)

Correct answer: A

Explanation

The correct answer is A, IP Security (IPSec), because it is specifically designed to provide secure communication over an IP network, and it can be used with L2TP for encryption. The other options, while related to encryption, do not directly fulfill the requirement for securing L2TP connections across a public network.