--- service: i.root-servers.net start-period: '2015-07-15T00:00:00Z' end-period: '2015-07-16T00:00:01Z' metric: traffic-volume dns-udp-queries-received-ipv4: 5449855499 dns-udp-queries-received-ipv6: 254023345 dns-tcp-queries-received-ipv4: 11370728 dns-tcp-queries-received-ipv6: 285259 dns-udp-responses-sent-ipv4: 5401358677 dns-udp-responses-sent-ipv6: 258508556 dns-tcp-responses-sent-ipv4: 11208627 dns-tcp-responses-sent-ipv6: 286373