Which of the following information is the real-time backup data of HSB business? (Multiple choice)

Question

Options

• ACAPWAP tunnel information
• BDHCP address information
• CUser login information
• DAP entry

• A
  100% (16)

Explanation

All four options are correct because HSB (Hot Standby Backup) on a wireless AC (Access Controller) requires real-time synchronization of all session-critical state so the standby device can take over instantly without disrupting users or APs.

• A (CAPWAP tunnel info): The standby AC must mirror all active CAPWAP tunnels between the primary AC and its APs - otherwise APs would need to re-establish tunnels from scratch after a failover, causing an outage.
• B (DHCP address info): If the AC serves as a DHCP server, the standby must know all issued leases to prevent IP conflicts and avoid forcing clients to re-request addresses after switchover.
• C (User login info): Active user sessions (authentication state, session keys) must be replicated so users are not forced to re-authenticate when the standby takes over.
• D (AP entry): AP registration records (AP identity, config, state) must exist on the standby so it can immediately manage all APs without a re-discovery phase.

Since all four options are correct, there are no distractors to eliminate in this question.

Memory tip: Think of HSB as "what would break if users lost it mid-session?" - tunnels, addresses, logins, and AP records are the four pillars that must survive a failover invisibly. If it affects a live user or a live AP, it's backed up in real time.

No community discussion yet for this question.