Our network uses IP Anycast to route your DNS request to the topologically nearest or best datacenter; thus enabling us to increase your website and services performance and uptime. It also gives our customers load balancing, increased reliability and scalability, decreased latency and a way to provide a distributed response to a DDoS attack. IP Anycast works because all of our worldwide locations respond to the exact same IP address (same name server).
See also:
DDoS
Load Balancing
IP Address