--- service: i.root-servers.net start-period: '2015-05-19T00:00:00Z' end-period: '2015-05-20T00:00:02Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4056135909 dns-udp-queries-received-ipv6: 259246142 dns-tcp-queries-received-ipv4: 11772554 dns-tcp-queries-received-ipv6: 281741 dns-udp-responses-sent-ipv4: 3997952291 dns-udp-responses-sent-ipv6: 262290880 dns-tcp-responses-sent-ipv4: 11791656 dns-tcp-responses-sent-ipv6: 288344