--- service: a.root-servers.net start-period: '2015-09-23T00:00:00Z' end-period: '2015-09-23T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3218344199 dns-udp-queries-received-ipv6: 307665337 dns-tcp-queries-received-ipv4: 23685078 dns-tcp-queries-received-ipv6: 11050946 dns-udp-responses-sent-ipv4: 3243206350 dns-udp-responses-sent-ipv6: 309957599 dns-tcp-responses-sent-ipv4: 20394059 dns-tcp-responses-sent-ipv6: 9395142