ISC2 Exam SSCP Topic 2 Question 33 Discussion

Actual exam question for ISC2's Systems Security Certified Practitioner exam

Question #: 33
Topic #: 2

Which of the following statements pertaining to link encryption is false?

AIt encrypts all the data along a specific communication path.

BIt provides protection against packet sniffers and eavesdroppers.

CInformation stays encrypted from one end of its journey to the other.

DUser information, header, trailers, addresses and routing data that are part of the packets are encrypted.

Show Suggested Answer

Suggested Answer: C

When using link encryption, packets have to be decrypted at each hop and encrypted again.

Information staying encrypted from one end of its journey to the other is a characteristic of end-to-end encryption, not link encryption.

Link Encryption vs. End-to-End Encryption

Link encryption encrypts the entire packet, including headers and trailers, and has to be decrypted at each hop.

End-to-end encryption does not encrypt the IP Protocol headers, and therefore does not need to be decrypted at each hop.

and

Source: WALLHOFF, John, CBK#5 Cryptography (CISSP Study Guide), April 2002 (page 6).

by Jolene at May 08, 2022, 09:41 PM

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