--- service: i.root-servers.net start-period: '2016-03-15T00:00:00Z' end-period: '2016-03-16T00:00:03Z' metric: traffic-volume dns-udp-queries-received-ipv4: 5233951857 dns-udp-queries-received-ipv6: 439629725 dns-tcp-queries-received-ipv4: 23601566 dns-tcp-queries-received-ipv6: 1423641 dns-udp-responses-sent-ipv4: 5146078725 dns-udp-responses-sent-ipv6: 450347580 dns-tcp-responses-sent-ipv4: 23371857 dns-tcp-responses-sent-ipv6: 1426505