--- service: i.root-servers.net start-period: '2013-06-03T00:00:00Z' end-period: '2013-06-04T00:00:01Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2114426290 dns-udp-queries-received-ipv6: 104372948 dns-tcp-queries-received-ipv4: 3705766 dns-tcp-queries-received-ipv6: 134105 dns-udp-responses-sent-ipv4: 2119053737 dns-udp-responses-sent-ipv6: 112732937 dns-tcp-responses-sent-ipv4: 3790483 dns-tcp-responses-sent-ipv6: 134754