WPI users may be experiencing issues accessing certain third party Web sites and WPI services that leverage DYN's services. Includes Qualtrics, People Admin, STARS, Echo 360, and more third party tools. A denial of service (DoS) attack is an incident in which a user or organization is deprived of the services of a resource they would normally expect to have. In a distributed denial-of-service, large numbers of compromised systems attack a single target