(ISC)2 CISSP-ISSAP Exam Which of the following methods will allow data to be sent on the Internet in a secure format?

Question

Options

• ASerial Line Interface Protocol
• BPoint-to-Point Protocol
• CBrowsing
• DVirtual Private Networks

• A
  5% (2)
• B
  2% (1)
• C
  2% (1)
• D
  90% (37)

Explanation

Virtual Private Networks (VPNs) encrypt data before it traverses the public Internet, creating a secure "tunnel" that protects confidentiality and integrity - making D the only choice that directly addresses secure transmission.

Why the distractors fail:

• A (SLIP - Serial Line Interface Protocol): An outdated Layer 2 protocol for serial connections with no encryption or authentication support whatsoever.
• B (PPP - Point-to-Point Protocol): SLIP's successor that adds authentication options (PAP/CHAP) and error detection, but still provides no inherent encryption for Internet data in transit.
• C (Browsing): A user activity, not a protocol or security mechanism - browsing can be secured (via HTTPS), but browsing itself is not a security method.

Memory tip: Think "VPN = Vault on Public Networks." When the exam asks about securing data across the Internet, the answer involves encryption + tunneling - which is VPN's defining purpose. SLIP and PPP are dial-up era link protocols; they connect you but don't protect you.

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