Which of the following is responsible for the most security issues?

A.
Outside espionage

B.
Hackers

C.
Personnel

D.
Equipment failure

Explanation:
As I stated earlier in the comments, the great part of the attacks to companies comes from the
personnel. Hackers are out there and attack some targets, but should never forget that your worst
enemy can be inside of your company. Is for that that we usually implement IDS and profundity
security. It’s a very good practice to install Host based IDS to limit the ability of internal attackers
through the machines. Another problem with personal is the ignorance, there are time that they just
don’t know what they are doing, and certainly are violating the security policy.