--- service: a.root-servers.net start-period: '2015-08-04T00:00:00Z' end-period: '2015-08-04T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4681490143 dns-udp-queries-received-ipv6: 283886963 dns-tcp-queries-received-ipv4: 20187807 dns-tcp-queries-received-ipv6: 9846624 dns-udp-responses-sent-ipv4: 4703430186 dns-udp-responses-sent-ipv6: 286216576 dns-tcp-responses-sent-ipv4: 17080957 dns-tcp-responses-sent-ipv6: 10123054