What is Pentest ??

PenTest is the acronym for Penetration Test,
Penetration Test itself is a method to evaluate the security of a computer or a network by simulating possible real attack performed by Black hackers or cracker.
So generally, Pentest is not a bad activity and have a good ethics. By simulating the attack performed by the black hackers, Pentester also try to attack the system using the ways that also will possibly used by the real black hackers or crackers. PenTest is more to the defensive purpose (because after attack the system and find the weak point of the system, pentester will inform the admin of the system to fix it).