Which of the following situations will cause the stack standby switch to be promoted to the stack master switch? (Multiple choice) A. The user performs active/standby switchover through commands B…

Question

Options

• AThe user performs active/standby switchover through commands
• BMaster switch restarts abnormally
• CUsers can perform stack smooth upgrade through commands.
• DRestart from switch failure

• A
  79% (52)
• C
  15% (10)
• D
  6% (4)

Explanation

A and B are correct because they represent scenarios where the stack master becomes unavailable or is explicitly replaced: a manual command-based switchover (A) is a deliberate administrative action that transfers master role to the standby, while an abnormal master restart (B) triggers automatic failover since the standby must assume control to maintain network continuity.

C (smooth upgrade) is wrong because a stack smooth upgrade is a controlled, rolling process specifically designed to avoid abrupt master changes - the standby may temporarily handle forwarding, but the upgrade mechanism manages the transition gracefully without a true promotion event.

D (restart from switch failure) is wrong because "restarting from a failure" implies a recovery/graceful restart scenario where the original master resumes operation - this is a controlled recovery, not an uncontrolled outage that forces the standby to take permanent control.

Memory tip: Think of promotion as requiring either intent (admin commands = A) or emergency (master goes down unexpectedly = B). Controlled processes like smooth upgrades (C) and graceful restarts (D) are designed precisely to avoid triggering emergency promotion.

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