--- service: a.root-servers.net start-period: '2015-05-13T00:00:00Z' end-period: '2015-05-13T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3357862665 dns-udp-queries-received-ipv6: 212282857 dns-tcp-queries-received-ipv4: 22259425 dns-tcp-queries-received-ipv6: 2205640 dns-udp-responses-sent-ipv4: 3313621613 dns-udp-responses-sent-ipv6: 215578750 dns-tcp-responses-sent-ipv4: 18252004 dns-tcp-responses-sent-ipv6: 1169090