The IP address for the trusted interface on your Firebox is 10.0.40.1/24, but you want to change the IP address for this interface. How can you avoid a network outage for clients on the trusted network when you change the interface IP address to 10.0.50.1/24? (Select one.)
To avoid a network outage for clients on the trusted network when changing the interface IP address from 10.0.40.1/24 to 10.0.50.1/24, you should add 10.0.40.1/24 as a secondary IP address for the interface. This way, the interface will temporarily have both IP addresses, allowing clients on the old 10.0.40.0/24 subnet to still communicate while you transition to the new 10.0.50.0/24 subnet.
Wording on this question could be clearer. Adding a secondary IP doesn't change the IP address of the interface, it'll just mean the interface has 2 IP addresses.
B. Add 10.0.40.1/24 as a secondary IP address for the interface.
B. Add 10.0.40.1/24 as a secondary IP address for the interface.
B is correct