--- service: a.root-servers.net start-period: '2015-05-30T00:00:00Z' end-period: '2015-05-30T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2379672013 dns-udp-queries-received-ipv6: 162296280 dns-tcp-queries-received-ipv4: 16858480 dns-tcp-queries-received-ipv6: 2161799 dns-udp-responses-sent-ipv4: 2406725099 dns-udp-responses-sent-ipv6: 164732729 dns-tcp-responses-sent-ipv4: 15200849 dns-tcp-responses-sent-ipv6: 1280952