--- service: i.root-servers.net start-period: '2014-05-17T00:00:00Z' end-period: '2014-05-18T00:00:01Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2423450858 dns-udp-queries-received-ipv6: 225635304 dns-tcp-queries-received-ipv4: 6079934 dns-tcp-queries-received-ipv6: 223752 dns-udp-responses-sent-ipv4: 2374401837 dns-udp-responses-sent-ipv6: 228650358 dns-tcp-responses-sent-ipv4: 6111961 dns-tcp-responses-sent-ipv6: 228321