Companies urged to use multiple vendors in wake of cyber attack

Companies can reduce the risk from the type of cyber attack that took out major websites on Friday by using multiple vendors for the critical internet service known as a domain name service, or DNS, companies and security experts said on Sunday. "We have advocated for years for redundancy in your infrastructure," said Kyle York, chief strategy officer for Dyn, the New Hampshire DNS provider that was attacked on Friday. York said clients who used multiple servers "saw less of an impact." Using multiple DNS providers can, however, make managing traffic more complicated and costly, experts said.

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