Exam 300-710 topic 1 question 266 discussion

A network engineer is deploying a pair of Cisco Secure Firewall Threat Defense devices managed by Cisco Secure Firewall Management Center for High Availability. Internet access is a high priority for the business and therefore they have invested in internet circuits from two different ISPs. The requirement from the customer is that internet access must be available to their users even if one of the ISPs is down. Which two features must be deployed to achieve this requirement? (Choose two.)