--- service: a.root-servers.net start-period: '2015-06-06T00:00:00Z' end-period: '2015-06-06T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2577068850 dns-udp-queries-received-ipv6: 198324022 dns-tcp-queries-received-ipv4: 17157158 dns-tcp-queries-received-ipv6: 4531940 dns-udp-responses-sent-ipv4: 2602880361 dns-udp-responses-sent-ipv6: 200670500 dns-tcp-responses-sent-ipv4: 14728835 dns-tcp-responses-sent-ipv6: 3245250