In computing, a "blacklist" is a list of entities that are denied access to a particular system, service, or network. The term is commonly used in various contexts, including: 1. **Network Security**: In cybersecurity, a blacklist may refer to IP addresses, domain names, or email addresses that are known to be involved in malicious activities, such as spam or hacking attempts. Firewalls and security software can use blacklists to block incoming or outgoing traffic from these sources.
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