Which of the following concepts defines the requirement…

Which of the following concepts defines the requirement for data availability?

Which of the following concepts defines the requirement for data availability?

A.
Authentication to RADIUS

B.
Non-repudiation of email messages

C.
Disaster recovery planning

D.
Encryption of email messages

Explanation:
A disaster-recovery plan, or scheme, helps an organization respond effectively when a disaster occurs. Disasters may include system failure, network failure,
infrastructure failure, and natural disaster. The primary emphasis of such a plan is reestablishing services and minimizing losses.
Incorrect Answers:
A: Authentication issues deals with authorized access to resources.
B: Nonrepudiation prevents one party from denying actions that they carried out and in the electronic world nonrepudiation measures can be a two-key
cryptographic system and the involvement of a third party to verify the validity. This respected third party `vouches’ for the individuals in the two-key system.
D: Encryption of email messages is concerned with confidentiality.

Dulaney, Emmett and Chuck Eastton, CompTIA Security+ Study Guide, Sixth Edition, Sybex, Indianapolis, 2014, pp 29, 262, 433-434



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