Which of the following do hackers target because it usually communicates in Cleartext?

A.
Router

B.
DNS server

C.
FTP server

D.
E-mail server

Explanation:
A FTP server does not use encryption techniques to protect passwords or the data stream. It is almost a sure bet that FTP will always be in cleartext.
Incorrect Answers:
A: Router communications (router to router, including routing information) can be secured. Routers will be targeted by hackers for reasons other reasons.
B: The DNS servers communicate in cleartext, but use a form of signature to prevent data changing during a hijacking attempt.
D: Most of the e-mail is transferred in the clear, but there are also e-mail servers which can protect the data via encryption and digital signatures.