--- service: a.root-servers.net start-period: '2014-04-30T00:00:00Z' end-period: '2014-04-30T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2537646537 dns-udp-queries-received-ipv6: 112197905 dns-tcp-queries-received-ipv4: 13402954 dns-tcp-queries-received-ipv6: 1422529 dns-udp-responses-sent-ipv4: 2536919378 dns-udp-responses-sent-ipv6: 112161927 dns-tcp-responses-sent-ipv4: 13365896 dns-tcp-responses-sent-ipv6: 149