--- service: i.root-servers.net start-period: '2016-02-17T00:00:00Z' end-period: '2016-02-18T00:00:01Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4901634552 dns-udp-queries-received-ipv6: 403765051 dns-tcp-queries-received-ipv4: 14360746 dns-tcp-queries-received-ipv6: 1256237 dns-udp-responses-sent-ipv4: 4871913997 dns-udp-responses-sent-ipv6: 404351248 dns-tcp-responses-sent-ipv4: 14334817 dns-tcp-responses-sent-ipv6: 1255709