--- service: i.root-servers.net start-period: '2015-04-05T00:00:00Z' end-period: '2015-04-06T00:00:15Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2976880964 dns-udp-queries-received-ipv6: 224734522 dns-tcp-queries-received-ipv4: 7359335 dns-tcp-queries-received-ipv6: 234631 dns-udp-responses-sent-ipv4: 2933445961 dns-udp-responses-sent-ipv6: 227545034 dns-tcp-responses-sent-ipv4: 7382396 dns-tcp-responses-sent-ipv6: 243148