You have been charged with performing a number of security tests against a partner organization in Australia. Your boss, who is in charge of your company and the partner company’s IT departments, wants you to run tests just like an outside hacker would against their network. He also wants you to perform all of your tests without tipping off the IT department at the partner company. You have no knowledge of the partner company’s systems other than their name and their external website. You decide to perform some passive scanning so as not to tip off anyone at the partner company.?
What would be considered passive scanning?

A.
Firewalking

B.
Whois

C.
Netcraft

D.
Friendly Pinger