Question

Who does test networks and systems to examine their performance and determine how vulnerable?

Answer 1

The white hat hacker is one who tests networks and systems to examine their performance and determine how vulnerable they are to intrusion. Usually, white hat hackers crack their own systems or the systems of a client who has specifically employed them for the purposes of security auditing.

Answer 2

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$\mathtt{Here\:is\:ur\:@nswer}$ :

⎇ White hat hacker tests networks and systems to examine their performance and determine how vulnerable they are to intrusion.

Usually, white hat hackers crack their own systems or the systems of a client who has specifically employed them for the purposes of security auditing.