--- service: a.root-servers.net start-period: '2013-11-15T00:00:00Z' end-period: '2013-11-15T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 1559207125 dns-udp-queries-received-ipv6: 86728799 dns-tcp-queries-received-ipv4: 7390543 dns-tcp-queries-received-ipv6: 1578861 dns-udp-responses-sent-ipv4: 1556945019 dns-udp-responses-sent-ipv6: 86740834 dns-tcp-responses-sent-ipv4: 7544667 dns-tcp-responses-sent-ipv6: 8778