Which feature of Digest Authentication prevents credentials from being sent in plaintext?

What software defined architecture plane assists network devices with making packet-forwarding decisions by providing Layer 2 reachability and Layer 3 routing information?

Router A learns the same route from two different neighbors, one of the neighbor routers is an OSPF neighbor and the other is an EIGRP neighbor. What is the administrative distance of the route that will be installed in the routing table?

Which two events occur automatically when a device Is added to Cisco DNA Center? (Choose two. )