Explanation/Reference:
Explanation:
Two-factor authentication provides identification of users via the combination of two different components, which could be something that the user knows, something that the user possesses or something that is inseparable from the user.
Incorrect Answers:
A: Multi-party authentication is not a valid term.
C: Mandatory authentication is not a valid term.
D: Discretionary authentication is not a valid term.
References:
https://en.wikipedia.org/wiki/Two-factor_authentication

Explanation/Reference:
Explanation:
The Oakley Key Determination Protocol is a key-agreement protocol that allows authenticated parties to exchange keying material across an insecure connection by making use of the Diffie-Hellman key exchange algorithm. It formed the basis for the more widely used Internet key exchange protocol.
Incorrect Answers:
A: The Diffie-Hellman algorithm proposed for IPsec is the Diffie-Hellman Key Exchange Protocol.
B: Internet Key Exchange (IKE) provides authenticated keying material for use with ISAKMP. It has not superseded ISAKMP.
C: SKIP is a distribution protocol, not a key establishment protocol.
References:
Harris, Shon, All In One CISSP Exam Guide, 6th Edition, McGraw-Hill, 2013, p. 863
https://en.wikipedia.org/wiki/Oakley_protocol
https://en.wikipedia.org/wiki/Diffie-Hellman_key_exchange
https://en.wikipedia.org/wiki/Simple_Key-Management_for_Internet_Protocol

Source: TIPTON, Hal, (ISC)2, Introduction to the CISSP Exam presentation.

The answer: Common-mode noise is electrical noise between the hot and ground wire and between the neutral and ground wire.
Common mode noise will disrupt the memory logic of the processor. Noise between neutral and ground creates problems since the theoretical zero voltage between neutral and ground is utilized by microprocessors and digital logic control systems as zero voltage reference. A voltage on the ground wire will disrupt the stored memory variables of today's fast microprocessors. Common mode noise can be incorrectly interpreted as data.
This noise can cause what appears to be "software glitches", erratic performance of the equipment and partial or complete memory loss. Poor grounding also contributes significantly to common mode noise and this dynamic situation can change with building age, material corrosion, soil conditions and construction.
Source: KRUTZ, Ronald L. & VINES, Russel D., The CISSP Prep Guide: Mastering the Ten Domains of Computer Security, page 332.
The Official ISC2 Study book on page 461 says: EMI is categorized as either common-mode noise or traverse-mode noise. Common-Mode noise occurs between hot and ground wires. Traverse-mode noise occurs between hot and neutral wires.