--- service: i.root-servers.net start-period: '2016-03-13T00:00:00Z' end-period: '2016-03-14T00:00:01Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4630212665 dns-udp-queries-received-ipv6: 408880438 dns-tcp-queries-received-ipv4: 25448802 dns-tcp-queries-received-ipv6: 1122887 dns-udp-responses-sent-ipv4: 4553868004 dns-udp-responses-sent-ipv6: 412698171 dns-tcp-responses-sent-ipv4: 25455790 dns-tcp-responses-sent-ipv6: 1124726