--- service: i.root-servers.net start-period: '2013-06-07T00:00:00Z' end-period: '2013-06-08T00:00:03Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2171877511 dns-udp-queries-received-ipv6: 106662046 dns-tcp-queries-received-ipv4: 3650890 dns-tcp-queries-received-ipv6: 151916 dns-udp-responses-sent-ipv4: 2174045205 dns-udp-responses-sent-ipv6: 113240079 dns-tcp-responses-sent-ipv4: 3701321 dns-tcp-responses-sent-ipv6: 154156