--- service: i.root-servers.net start-period: '2015-11-28T00:00:00Z' end-period: '2015-11-29T00:00:01Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4144550058 dns-udp-queries-received-ipv6: 308371663 dns-tcp-queries-received-ipv4: 25811796 dns-tcp-queries-received-ipv6: 730265 dns-udp-responses-sent-ipv4: 4103572484 dns-udp-responses-sent-ipv6: 311136095 dns-tcp-responses-sent-ipv4: 25769620 dns-tcp-responses-sent-ipv6: 733595