--- service: a.root-servers.net start-period: '2015-03-30T00:00:00Z' end-period: '2015-03-30T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2968709139 dns-udp-queries-received-ipv6: 233803416 dns-tcp-queries-received-ipv4: 19627985 dns-tcp-queries-received-ipv6: 2100405 dns-udp-responses-sent-ipv4: 2947339120 dns-udp-responses-sent-ipv6: 232926243 dns-tcp-responses-sent-ipv4: 16232106 dns-tcp-responses-sent-ipv6: 1184504