--- service: i.root-servers.net start-period: '2015-03-07T00:00:00Z' end-period: '2015-03-08T00:00:07Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2996841089 dns-udp-queries-received-ipv6: 215181980 dns-tcp-queries-received-ipv4: 6643437 dns-tcp-queries-received-ipv6: 201531 dns-udp-responses-sent-ipv4: 2959597820 dns-udp-responses-sent-ipv6: 218983186 dns-tcp-responses-sent-ipv4: 6719986 dns-tcp-responses-sent-ipv6: 210752