Chapter 14. Redundancy and Disaster Recovery

This chapter covers the following subjects:

• Redundancy Planning—This section is all about ensuring your network and servers are fault tolerant. By setting up redundant power, data, servers, and even ISPs, you can avoid many disasters that could threaten the security of your organization.

• Disaster Recovery Planning and Procedures—A disaster is when something happens to your network that your fault-tolerant methods cannot prevent. To help recover after a disaster, data should be backed up, and a proper disaster recovery plan should be designed, practiced, and implemented if necessary.

This chapter covers the CompTIA Security+ SY0-301 objectives 1.1, 2.5, and 2.7.

The typical definition of “redundant” means superfluous or uncalled for. However, it is not so in the IT field. Being redundant is a way of life. It is a way of enhancing your servers, network devices, and other equipment. It is a way of developing fault tolerance—the capability to continue functioning even if there is an error.