As J root server and .com and .net TLDs are all of them physically close replicas, response time to a DNS query is improved. Indeed, by minimizing the global impact in case of DDoS (Distributed Denial-of-Service), security is also enhanced.
Verisign, digital infrastructure services provider, operates the authoritative records .com and .net domains, as well as the two root servers A and J. Verisign has deployed several replicas within the RIRS (Regional Internet Resolution Sites) program context to improve the availability of these domains. Such an action is a continuity of the Titan project, started in 2007, whose aim is to diversify systems, increase stability and improve the speed in resolving names for final users.