--- service: i.root-servers.net start-period: '2015-02-10T00:00:00Z' end-period: '2015-02-11T00:00:04Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3516645042 dns-udp-queries-received-ipv6: 260328816 dns-tcp-queries-received-ipv4: 7200282 dns-tcp-queries-received-ipv6: 222259 dns-udp-responses-sent-ipv4: 3463953908 dns-udp-responses-sent-ipv6: 260285590 dns-tcp-responses-sent-ipv4: 7215339 dns-tcp-responses-sent-ipv6: 230756