If an attacker purchases and uses a url that is similar in spelling and looks like a well-known web site in order for the attacker to gain web traffic to generate income, what type of attack are they using?
a) spoofing
b) url hijacking
c) web squatting
d) typo hijacking

URL hijacking

Explanation:

URL hijacking also known as  "typosquatting," is the process where by an attackers takes advantage of common typos users make when entering a Web address (URL) into their browser by purchasing and using a URL that is similar in spelling and looks like the well-known web site in order for the attacker to gain Web traffic to generate income.