Network+™: Study Guide, Fourth Edition

9.1. Assessing Fault Tolerance and Disaster Recovery Needs

Before implementing fault tolerance or disaster recovery, you should determine how critical your systems are to daily business operations. Additionally, you should determine how long each system could afford to be nonfunctional (down). Making these determinations will dictate which fault tolerance and disaster recovery methods you implement and to what extent. The more vital the system, the greater lengths (and, thus, the greater expense) you should go to in order to protect it from downtime. Less-critical systems may call for simpler measures. For example, banks, insurance companies, the U.S. government, and airlines all run highly critical computer and network systems. Thus, they all ...