--- service: i.root-servers.net start-period: '2015-05-29T00:00:00Z' end-period: '2015-05-30T00:00:01Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3606879092 dns-udp-queries-received-ipv6: 253898693 dns-tcp-queries-received-ipv4: 12596306 dns-tcp-queries-received-ipv6: 303160 dns-udp-responses-sent-ipv4: 3553067873 dns-udp-responses-sent-ipv6: 256429663 dns-tcp-responses-sent-ipv4: 12627818 dns-tcp-responses-sent-ipv6: 305505