--- service: i.root-servers.net start-period: '2015-03-22T00:00:00Z' end-period: '2015-03-23T00:00:05Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3180142857 dns-udp-queries-received-ipv6: 233291605 dns-tcp-queries-received-ipv4: 7563268 dns-tcp-queries-received-ipv6: 220396 dns-udp-responses-sent-ipv4: 3134517022 dns-udp-responses-sent-ipv6: 236760447 dns-tcp-responses-sent-ipv4: 7615162 dns-tcp-responses-sent-ipv6: 227325