--- service: i.root-servers.net start-period: '2013-06-01T00:00:00Z' end-period: '2013-06-02T00:00:02Z' metric: traffic-volume dns-udp-queries-received-ipv4: 1883480635 dns-udp-queries-received-ipv6: 95735591 dns-tcp-queries-received-ipv4: 3106698 dns-tcp-queries-received-ipv6: 119777 dns-udp-responses-sent-ipv4: 1887723361 dns-udp-responses-sent-ipv6: 102996617 dns-tcp-responses-sent-ipv4: 3324199 dns-tcp-responses-sent-ipv6: 119527