--- service: j.root-servers.net start-period: '2015-04-18T00:00:00Z' end-period: '2015-04-18T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2982889568 dns-udp-queries-received-ipv6: 210196482 dns-tcp-queries-received-ipv4: 23322989 dns-tcp-queries-received-ipv6: 4905013 dns-udp-responses-sent-ipv4: 2923940076 dns-udp-responses-sent-ipv6: 210084275 dns-tcp-responses-sent-ipv4: 22949818 dns-tcp-responses-sent-ipv6: 4189456