--- service: i.root-servers.net start-period: '2013-05-13T00:00:00Z' end-period: '2013-05-14T00:00:01Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2118907658 dns-udp-queries-received-ipv6: 104733648 dns-tcp-queries-received-ipv4: 2963223 dns-tcp-queries-received-ipv6: 124284 dns-udp-responses-sent-ipv4: 2126913933 dns-udp-responses-sent-ipv6: 111667707 dns-tcp-responses-sent-ipv4: 3186323 dns-tcp-responses-sent-ipv6: 125965