Regarding the load sharing method of the dual-machine hot backup solution, which of the following statements is correct? (Multiple choice)

Question

Options

• AThe VRRP hot backup method can be applied to the load sharing method
• BThe selection of dual-system hot backup master and backup devices is consistent with the
• CThe HSB master/standby service will back up relevant information on the master device to the
• DDual-link backup can be applied to load sharing

• A
  26% (8)
• B
  74% (23)

Explanation

In a dual-machine hot backup load sharing solution, both devices are simultaneously active - this is the defining characteristic that determines which methods are compatible. Options B, C, and D are correct because: the master/backup device selection criteria (B) remain consistent regardless of whether you use active/standby or load sharing; HSB (Hot Standby Backup) still synchronizes session and state information from master to standby (C) to ensure continuity; and dual-link backup (D) is fundamentally compatible with load sharing since it operates at the link/physical layer independently of the load distribution logic.

Why A is wrong: The VRRP hot backup method enforces a single-master constraint - only one device holds the VRRP Master role per group at any time, making it inherently an active/standby solution. Load sharing requires both devices to be simultaneously active, which directly contradicts VRRP hot backup's election model. These two are mutually exclusive operational modes, not compatible ones.

Memory tip: Anchor on the phrase "load sharing" - sharing means both devices are active at once. Ask yourself: does this method allow both devices to be active simultaneously? VRRP hot backup says "only one master" → incompatible. HSB sync, dual-link, and device selection rules all work regardless of who's active → compatible.

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