SAN FRANCISCO--(BUSINESS WIRE)--Seventy-six percent of organizations in the U.S. and U.K. have suffered a Domain Name System (DNS) attack, with 49 percent experiencing one in the past 12 months. The most common DNS threats reported were DDoS (74 percent), DNS exfiltration (46 percent), DNS tunneling (45 percent) and DNS hijacking (33 percent) by those who had suffered an attack. That’s according to an independent research study undertaken by Vanson Bourne and commissioned by Cloudmark, Inc. Thr