An example shows how your computer and systems could be affected by a cybersecurity incident, whether due to inadequate cybersecurity controls, man-made disasters or natural, or from malicious users wreaking havoc. , which includes denial of service, malware, worms and Trojans, botnets and zombies, social media attacks, and shareware or false security software warnings. Denial of service refers to an attack that successfully prevents or impairs authorized functionality of networks, systems or applications by exhausting resources. Typically, loss of service is the inability of a particular network service, such as email, to be available or the temporary loss of all network connectivity and services. A denial of service attack can also destroy the programming and files of affected computer systems. In some cases, denial-of-service attacks have forced websites visited by millions of people to temporarily cease operations. This can be avoided by blocking the attack with packet filters on the router(s). This is by far the best method, and if you succeed, you're pretty much done, except that it's always a good idea to contact other ISPs that are victims of this attack. Malware, worms and Trojan horses; these spread through email, instant messaging, malicious websites, and non-malicious infected websites. Some websites automatically download the malware without the user's knowledge or knowledge.