--- service: i.root-servers.net start-period: '2015-07-13T00:00:00Z' end-period: '2015-07-14T00:00:02Z' metric: traffic-volume dns-udp-queries-received-ipv4: 5067038121 dns-udp-queries-received-ipv6: 244322508 dns-tcp-queries-received-ipv4: 11097340 dns-tcp-queries-received-ipv6: 278177 dns-udp-responses-sent-ipv4: 5021553970 dns-udp-responses-sent-ipv6: 248793199 dns-tcp-responses-sent-ipv4: 10996560 dns-tcp-responses-sent-ipv6: 279364