Go back to 642-591 - CANAC - Implementing Cisco NAC Appliance

Question :-

In a Cisco NAM high-availability configuration, when does the secondary Cisco NAM take over?
When the IP-based heartbeat signal fails to be transmitted and received within a certain time period
When the UDP heartbeat signal fails to be transmitted on the serial heartbeat connection between failover peers
When the UDP heartbeat signal is not transmitted and received within a certain time period
When the timeout value is exceeded during data-mirroring activities

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