--- service: a.root-servers.net start-period: '2015-08-11T00:00:00Z' end-period: '2015-08-11T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4575150234 dns-udp-queries-received-ipv6: 303244024 dns-tcp-queries-received-ipv4: 18636546 dns-tcp-queries-received-ipv6: 10052993 dns-udp-responses-sent-ipv4: 4686793076 dns-udp-responses-sent-ipv6: 306763569 dns-tcp-responses-sent-ipv4: 15723128 dns-tcp-responses-sent-ipv6: 8336121