--- service: i.root-servers.net start-period: '2015-02-08T00:00:00Z' end-period: '2015-02-09T00:00:04Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3123732354 dns-udp-queries-received-ipv6: 242150611 dns-tcp-queries-received-ipv4: 5976051 dns-tcp-queries-received-ipv6: 189030 dns-udp-responses-sent-ipv4: 3078947066 dns-udp-responses-sent-ipv6: 242105601 dns-tcp-responses-sent-ipv4: 6024079 dns-tcp-responses-sent-ipv6: 198053