Explanation/Reference:
Explanation:
Any time a major functional change of an application occurs, a new BCDR test should be done to ensure the overall strategy and process are still applicable and appropriate.

Explanation
Trust zones can be implemented to separate systems or tiers along logical lines for great security and access controls. Each zone can then have its own security controls and monitoring based on its particular needs.

Explanation/Reference:
Explanation:
DNSSEC is designed to prevent the spoofing and redirection of DNS resolutions to rogue sites.

Explanation
Whereas IRM is used to protect a broad range of data, DRM is focused specifically on the protection of consumer media, such as publications, music, movies, and so on. IRM is used to protect general institution data, so financial records, personnel data, and security profiles would all fall under the auspices of IRM.

Explanation
The best practice is to totally remove any unneeded services and utilities on a system to prevent any chance of compromise or use. If they are just disabled, it is possible for them to be inadvertently started again at any point, or another exploit could be used to start them again. Removing also negates the need to patch and maintain them going forward.