9.10. Answers to Review Questions
D. A failover server must have a connection available to the other server in case the other server goes down. Thus, there is a dedicated network between the two to ensure that the other server will be available when the failover occurs.
B. Failover servers send a signal to the backup failover server every few seconds. When the backup server detects that the primary server has not sent the signal after a specified time, the failover takes over until the primary comes back online. This signal is known as a "heartbeat."
A. VMS clustering makes many servers appear as one. If one server malfunctions, the others will keep functioning, thus allowing no breaks in network services.
C. Backup systems are designed to provide ...
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