--- service: a.root-servers.net start-period: '2015-10-17T00:00:00Z' end-period: '2015-10-17T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2695039024 dns-udp-queries-received-ipv6: 222835177 dns-tcp-queries-received-ipv4: 19096663 dns-tcp-queries-received-ipv6: 4790565 dns-udp-responses-sent-ipv4: 2701275210 dns-udp-responses-sent-ipv6: 221927891 dns-tcp-responses-sent-ipv4: 16533834 dns-tcp-responses-sent-ipv6: 3817720