--- service: i.root-servers.net start-period: '2013-09-02T00:00:00Z' end-period: '2013-09-03T00:00:08Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2148301030 dns-udp-queries-received-ipv6: 143593380 dns-tcp-queries-received-ipv4: 4889956 dns-tcp-queries-received-ipv6: 167822 dns-udp-responses-sent-ipv4: 2101199481 dns-udp-responses-sent-ipv6: 143565478 dns-tcp-responses-sent-ipv4: 4872677 dns-tcp-responses-sent-ipv6: 169788