--- service: i.root-servers.net start-period: '2013-09-06T00:00:00Z' end-period: '2013-09-07T00:00:02Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2362494622 dns-udp-queries-received-ipv6: 153645155 dns-tcp-queries-received-ipv4: 5111110 dns-tcp-queries-received-ipv6: 374450 dns-udp-responses-sent-ipv4: 2308622160 dns-udp-responses-sent-ipv6: 153679490 dns-tcp-responses-sent-ipv4: 5071524 dns-tcp-responses-sent-ipv6: 387178