$12.$ Try the following on the command line. What address do you get in each case? Why are they different?

a$)$ nslookup google.com

b$)$ nslookup google.com $8\mathrm{.}8\mathrm{.}8\mathrm{.}8$

c$)$ nslookup google.com $1\mathrm{.}1\mathrm{.}1\mathrm{.}1$