--- service: i.root-servers.net start-period: '2015-03-23T00:00:00Z' end-period: '2015-03-24T00:00:05Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3542046810 dns-udp-queries-received-ipv6: 247783371 dns-tcp-queries-received-ipv4: 8295588 dns-tcp-queries-received-ipv6: 235159 dns-udp-responses-sent-ipv4: 3492045766 dns-udp-responses-sent-ipv6: 251435541 dns-tcp-responses-sent-ipv4: 8351963 dns-tcp-responses-sent-ipv6: 242292