--- service: a.root-servers.net start-period: '2015-07-22T00:00:00Z' end-period: '2015-07-22T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4568022790 dns-udp-queries-received-ipv6: 290187790 dns-tcp-queries-received-ipv4: 18352249 dns-tcp-queries-received-ipv6: 10809710 dns-udp-responses-sent-ipv4: 4573488808 dns-udp-responses-sent-ipv6: 292213237 dns-tcp-responses-sent-ipv4: 15590171 dns-tcp-responses-sent-ipv6: 9275552