What are Snort and Bro examples of?

In the figure above, the server name and top-level domain are represented by ____.

A. item 1 B. item 2 C. item 3 D. item 4

The main reason for making every page or screen self-evident is that

a. people don’t like thinking about things. b. most people are going to spend far less time looking at them than we think. c. the competition is just one click away.