--- service: i.root-servers.net start-period: '2015-11-27T00:00:00Z' end-period: '2015-11-28T00:00:02Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4323837762 dns-udp-queries-received-ipv6: 320216047 dns-tcp-queries-received-ipv4: 28134296 dns-tcp-queries-received-ipv6: 727359 dns-udp-responses-sent-ipv4: 4281396090 dns-udp-responses-sent-ipv6: 325216669 dns-tcp-responses-sent-ipv4: 27979619 dns-tcp-responses-sent-ipv6: 729352