--- service: i.root-servers.net start-period: '2015-10-07T00:00:00Z' end-period: '2015-10-08T00:00:02Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4334585124 dns-udp-queries-received-ipv6: 344265217 dns-tcp-queries-received-ipv4: 29202657 dns-tcp-queries-received-ipv6: 497157 dns-udp-responses-sent-ipv4: 4262865114 dns-udp-responses-sent-ipv6: 343337241 dns-tcp-responses-sent-ipv4: 29178139 dns-tcp-responses-sent-ipv6: 500117