--- service: i.root-servers.net start-period: '2015-09-03T00:00:00Z' end-period: '2015-09-04T00:00:03Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4034697268 dns-udp-queries-received-ipv6: 277864088 dns-tcp-queries-received-ipv4: 30184531 dns-tcp-queries-received-ipv6: 433210 dns-udp-responses-sent-ipv4: 5416301008 dns-udp-responses-sent-ipv6: 277821054 dns-tcp-responses-sent-ipv4: 30196149 dns-tcp-responses-sent-ipv6: 437779