--- service: a.root-servers.net start-period: '2014-09-19T00:00:00Z' end-period: '2014-09-19T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2489002132 dns-udp-queries-received-ipv6: 174365599 dns-tcp-queries-received-ipv4: 16314006 dns-tcp-queries-received-ipv6: 1649857 dns-udp-responses-sent-ipv4: 2488940516 dns-udp-responses-sent-ipv6: 174367744 dns-tcp-responses-sent-ipv4: 15721719 dns-tcp-responses-sent-ipv6: 1095215