Your company is replacing a high-availability pair of Cisco ASA 5550 firewalls with the newer Cisco
ASA 5555-X models. Due to budget constraints, one Cisco ASA 5550 will be replaced at a time.
Which statement about the minimum requirements to set up stateful failover between these two
firewalls is true?
A.
You must install the USB failover cable between the two Cisco ASAs and provide a 1 Gigabit
Ethernet interface for state exchange.
B.
It is not possible to use failover between different Cisco ASA models.
C.
You must have at least 1 Gigabit Ethernet interface between the two Cisco ASAs for state
exchange.
D.
You must use two dedicated interfaces. One link is dedicated to state exchange and the other link
is for heartbeats.
Answer is correct:
“Hardware Requirements
The two units in a Failover configuration must:
Be the same model.
Have the same number and types of interfaces.
Have the same modules installed (if any)
Have the same RAM installed.”
https://www.cisco.com/c/en/us/td/docs/security/asa/asa95/configuration/general/asa-95-general-config/ha-failover.html#ID-2107-00000019