A recent hack attack with wide-reaching effects in the United States appears to have relied on hundreds of thousands of internet-connected devices, including cameras, baby monitors and home routers used without their owners’ knowledge. Hackers used software to command them to attack a target with overwhelming traffic. Many sites were inaccessible starting on the East Coast and spreading west across the country in three separate waves of attacks. Companies are being advised to increase redundancy both geographically and architecturally. Businesses can choose up to eight authoritative domain service providers (DNS), and some of the hardest-hit sites were customers who only picked DYN, the DNS that took a major hit from the attack.