--- service: i.root-servers.net start-period: '2015-03-16T00:00:00Z' end-period: '2015-03-17T00:00:20Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3398032307 dns-udp-queries-received-ipv6: 248557341 dns-tcp-queries-received-ipv4: 7346724 dns-tcp-queries-received-ipv6: 223572 dns-udp-responses-sent-ipv4: 3362295605 dns-udp-responses-sent-ipv6: 252241834 dns-tcp-responses-sent-ipv4: 7374792 dns-tcp-responses-sent-ipv6: 231231