A virus is a self-replicating software that copies itself by attaching itself to another programme, the boot sector of a computer, or a document. It spreads to other programmes and changes data. It transforms into something else. It protects itself by encrypting itself.
The main advantage of ethical hacking is that it prevents data from being stolen and misused by malevolent attackers, as well as discovering weaknesses from an attacker's point of view so that weak points may be corrected. Putting in place a secure network to avoid security breaches.
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