--- service: i.root-servers.net start-period: '2015-05-23T00:00:00Z' end-period: '2015-05-24T00:00:02Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3219309740 dns-udp-queries-received-ipv6: 223758440 dns-tcp-queries-received-ipv4: 11840377 dns-tcp-queries-received-ipv6: 281029 dns-udp-responses-sent-ipv4: 3169523315 dns-udp-responses-sent-ipv6: 226316136 dns-tcp-responses-sent-ipv4: 11927423 dns-tcp-responses-sent-ipv6: 286639