--- service: i.root-servers.net start-period: '2015-03-12T00:00:00Z' end-period: '2015-03-13T00:00:09Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3381148461 dns-udp-queries-received-ipv6: 251427737 dns-tcp-queries-received-ipv4: 7960045 dns-tcp-queries-received-ipv6: 249976 dns-udp-responses-sent-ipv4: 3343487453 dns-udp-responses-sent-ipv6: 255043390 dns-tcp-responses-sent-ipv4: 8019703 dns-tcp-responses-sent-ipv6: 256229