--- service: a.root-servers.net start-period: '2015-07-23T00:00:00Z' end-period: '2015-07-23T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4695709248 dns-udp-queries-received-ipv6: 277862578 dns-tcp-queries-received-ipv4: 18895986 dns-tcp-queries-received-ipv6: 11691795 dns-udp-responses-sent-ipv4: 4720520652 dns-udp-responses-sent-ipv6: 279951592 dns-tcp-responses-sent-ipv4: 15989269 dns-tcp-responses-sent-ipv6: 10167283