--- service: i.root-servers.net start-period: '2013-05-12T00:00:00Z' end-period: '2013-05-13T00:00:01Z' metric: traffic-volume dns-udp-queries-received-ipv4: 1750049087 dns-udp-queries-received-ipv6: 92650002 dns-tcp-queries-received-ipv4: 2592681 dns-tcp-queries-received-ipv6: 120099 dns-udp-responses-sent-ipv4: 1756260197 dns-udp-responses-sent-ipv6: 99373180 dns-tcp-responses-sent-ipv4: 2715555 dns-tcp-responses-sent-ipv6: 121620