--- service: i.root-servers.net start-period: '2015-02-26T00:00:00Z' end-period: '2015-02-27T00:00:07Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3515795739 dns-udp-queries-received-ipv6: 253180751 dns-tcp-queries-received-ipv4: 7964760 dns-tcp-queries-received-ipv6: 220528 dns-udp-responses-sent-ipv4: 3465840150 dns-udp-responses-sent-ipv6: 253163983 dns-tcp-responses-sent-ipv4: 7987528 dns-tcp-responses-sent-ipv6: 226360