A denial of service attack is an attempt to make a website or email address unavailable to its users. These types of attacks bring networks down by flooding them with useless traffic.
Denial of service is also known as a DoS attack or DDoS attack.
Victims of service denial attacks tend to be businesses, however political figures have also been targeted by criminals who disagree with their opinions and initiatives.
These crimes usually happen when a user has clicked on a link or opened an attachment within an email from an unknown source. When clicked, these links from unknown senders release a virus on to the computer and can take over an email account, website, social media account or access information held on the computer. These viruses can also send other spam messages or viruses to your email contacts.
Further advice and information on preventing a DDoS attack is available from the Get Safe Online website (opens in new window).