Which of the following is a attack type that is used to poison a network or computer to the point
where the system is turned into unusable state?
A.
Mail bombing
B.
Pharming
C.
Protocol spoofing
D.
Denial of service (DOS)
Explanation:
Denial of service (DOS) attack is an attack that is used to poison a network or computer to the point
where the system is turned into a unusable state.Answer A is incorrect. Mail bombing is an attack that is used to overwhelm mail servers and clients
by sending a large number of unwanted e-mails. The aim of this type of attack is to completely fill
the recipient’s hard disk with immense, useless files, causing at best irritation, and at worst total
computer failure. E-mail filtering and properly configuring email relay functionality on mail servers
can be helpful for protection against this type of attack.Answer B is incorrect. Pharming is a hacker’s attack aiming to redirect a Web site’s traffic to another
Web site. Pharming can be conducted either by changing the hosts files on a victim’s computer or by
exploitation of a vulnerability in DNS server software. DNS servers are computers responsible for
resolving Internet names into their IP addresses. Incorrect entries in a computer’s hosts files are a
popular target for malware.Answer C is incorrect. Protocol spoofing is used in data communications for enhancing the
performance in situations where an currently working protocol is inadequate. In a computer security
context, it refers to several forms of falsification of technically unrelated data.