thank you
Answers:
People are ALWAYS the weakest contact contained by the collateral wall of a company.
Because they are not programmable, and they own emotion.
Taking control of this inadequacy is call "Social Engineering", a extraordinarily exciting topic that allies psychology and computer skills.
Sholder Surfing, customarily done by an angry hand
Passwords. People are purely too stupid, and trademark bleak passwords. These can be efficiently cracked.
People, they are fallible
E-mails. Because abundant personnel exchange "funny" e-mails adjectives hours of daylight long, and they hold lots of attachments that are open lacking thinking and next, poof, gotta trust your virus protection.
IMO, passwords are a close secong.