Definition: Spam is a term that refers to unwanted digital communications. The term could refer to unsolicited email but relates to the misuse of any electronic messaging. Advertisers launch a significant portion of the unwanted but benign bulk traffic. Other sources include crackers who send unsolicited data designed to harm an information system. Sending unwanted messages has even invaded the domain of mobile phones, forums, discussion groups and social media sites.

Its Relevance: Millions of unwanted messages, email or other traffic are delivered in mass to IP addresses. The problem is so large that some providers must add capacity to handle the volume. An organization must address the problem in its official policies. It must harden its systems to block unwanted communication and educate its employees to keep from compromising security.

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