--- service: a.root-servers.net start-period: '2015-07-24T00:00:00Z' end-period: '2015-07-24T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4641249816 dns-udp-queries-received-ipv6: 270570121 dns-tcp-queries-received-ipv4: 18304541 dns-tcp-queries-received-ipv6: 11506942 dns-udp-responses-sent-ipv4: 4665166233 dns-udp-responses-sent-ipv6: 272550640 dns-tcp-responses-sent-ipv4: 15501135 dns-tcp-responses-sent-ipv6: 10048000