What is a DOS attack
DOS stands for Denial Of Service and is used to prevent access to an online service or to keep a person from accessing the internet. A DDOS is a Distributed Denial Of Service and is when multiple sources are used to prevent access. A DOS happens when someone sends requests to an address and the service cant keep up with the requests from the sender, this all happens specifically from 1 computer or attacking device. A DDOS is distributed meaning the requests come from multiple sources that is generally more of a dangerous attack because there is more traffic. A DDOS is usually carried out by someone who has a botnet or has lots of systems available, from there they would use a program to send requests to an address and hopefully take down the site or user.
What's so bad about a DOS
A Denial Of Service attack can cost a company or business thousands or millions of dollars depending on the time and site. A DOS might be used if something is happening that the attacker doesn't want to happen such as an election, census or protest. It can be used more cost worthy when it is used to stop traffic to betting websites which can give the attacker more odds of winning or just be intended to lose the site money. When a Denial Of Service takes place it can ruin reputation for a company or even trust in online security, on October 21st 1016 Dyn a major DNS provider was attacked which is responsible for allowing traffic to twitter, Spotify, Soundcloud, Shopify, Paypal and others. This made these sites and the DNS provider lose a lot of reputation for being safe and secure and it also lost these sites a lot of money. The attack was launch through a botnet called MIRAI ( Download Here )which now can be downloaded by anyone.