Denial of Service (DoS) attacks continue to be a tool used by hackers against websites and web servers. For this discussion, analyze the Mirai botnet attack against Brian Krebs (https://krebsonsecurity.com/2017/01/who-is-anna-senpai-the-mirai-worm-author (Links to an external site.)Links to an external site.); who did it, what devices were used, provide a technical synopsis of what happened, and explain what countermeasures you'd put in place to to make sure this doesn't happen again.