Drag and drop the steps in a standard DNS lookup operation from the left into the order on the right.

A network engineer must configure an interface with IIP address 10.10.10.145 and a subnet mask equivalent to 11111111.11111111.11111111.11111000. Which subnet mask must the engineer use?
Refer to the exhibit.

How does router R1 handle traffic to the 172.16.1.4/30 subnet?
What is the definition of backdoor malware?