--- service: a.root-servers.net start-period: '2014-06-15T00:00:00Z' end-period: '2014-06-15T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 1515395263 dns-udp-queries-received-ipv6: 105024109 dns-tcp-queries-received-ipv4: 7869654 dns-tcp-queries-received-ipv6: 1254414 dns-udp-responses-sent-ipv4: 1515194917 dns-udp-responses-sent-ipv6: 105027787 dns-tcp-responses-sent-ipv4: 7894889 dns-tcp-responses-sent-ipv6: 490547