Which of the following attacks could be the most common and most successful when network
security is properly implemented and configured?

A.
Logical attacks

B.
Physical attacks

C.
Social Engineering attacks

D.
Trojan Horse attacks

Explanation:
Social Engineering attacks – In computer security systems, this type of attack is usually the most
successful, especially when the security technology is properly implemented and configured.
Usually, these attacks rely on the faults in human beings. An example of a social engineering
attack has a hacker impersonating a network service technician. The serviceman approaches a
low-level employee and requests their password for network servicing purposes. With smartcards,
this type of attack is a bit more difficult. Most people would not trust an impersonator wishing to
have their smartcard and PIN for service purposes.