--- service: i.root-servers.net start-period: '2014-09-17T00:00:00Z' end-period: '2014-09-18T00:00:01Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3218224409 dns-udp-queries-received-ipv6: 216060375 dns-tcp-queries-received-ipv4: 7195520 dns-tcp-queries-received-ipv6: 254084 dns-udp-responses-sent-ipv4: 3159172987 dns-udp-responses-sent-ipv6: 220181322 dns-tcp-responses-sent-ipv4: 6986516 dns-tcp-responses-sent-ipv6: 256002