--- service: i.root-servers.net start-period: '2015-08-18T00:00:00Z' end-period: '2015-08-19T00:00:02Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3735650113 dns-udp-queries-received-ipv6: 270569402 dns-tcp-queries-received-ipv4: 30525483 dns-tcp-queries-received-ipv6: 381225 dns-udp-responses-sent-ipv4: 5295057009 dns-udp-responses-sent-ipv6: 270539395 dns-tcp-responses-sent-ipv4: 30571016 dns-tcp-responses-sent-ipv6: 385133