Hackers are categorized into the following classes:

* Black Hat Hackers (Crackers): These are persons who are computer specialists and use their hacking skills to carry out malicious attacks on information systems.
* Gray Hat Hackers: These are persons who sometimes do not break laws and help to defend a network, but sometimes act as Black Hat Hackers.
* White Hat Hackers (Ethical Hackers): These are persons who have excellent computer skills and use their knowledge to secure information systems.
* Security Providing Organizations:
Some organizations and communities also provide security to information systems.

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What Damage Can Hackers Do?

Hackers like to subvert computer security without permission. They are cyber criminals. This can mean gaining access to a computer across the Internet for illicit purposes. They might engage in

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What are the components of a security evaluation?

Any security evaluation involves three components: * Preparation: In this phase, a formal contract is signed between an ethical hacker and the authority of the organization that contains a non-disclosure

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What are whois queries?

Whois queries are used to determine the IP address ranges associated with clients. A whois query can be run on most UNIX environments. In a Windows environment, the tools such

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