--- service: i.root-servers.net start-period: '2015-04-23T00:00:00Z' end-period: '2015-04-24T00:00:02Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3941960560 dns-udp-queries-received-ipv6: 265927092 dns-tcp-queries-received-ipv4: 11095951 dns-tcp-queries-received-ipv6: 301683 dns-udp-responses-sent-ipv4: 3882425448 dns-udp-responses-sent-ipv6: 265819382 dns-tcp-responses-sent-ipv4: 11160383 dns-tcp-responses-sent-ipv6: 305709