ITPEC FE Morning October 2019 Question 14
ITPEC FE Morning October 2019 — Question 14 of 80
Hot Standby vs Cold Standby — backup system that is already running and ready to take over.
Two computers are prepared; when the active one fails, the system promptly switches to the backup that has the same programs already started.
- •Hot standby — backup is powered on, loaded, and synchronized; switchover is near-instant
- •Cold standby — backup is powered off or idle; requires boot-up and configuration before takeover
Why not others:
- (a) Cold standby system — backup is not pre-loaded; switching is slow
- (c) Multiprocessor system — multiple CPUs in one machine, not a redundancy scheme
- (d) Multiuser system — multiple users sharing one machine, unrelated to failover
Key rule: "Hot" = already running and ready; "Cold" = needs startup time.
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