--- service: a.root-servers.net start-period: '2015-04-11T00:00:00Z' end-period: '2015-04-11T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2656932523 dns-udp-queries-received-ipv6: 225367788 dns-tcp-queries-received-ipv4: 20975294 dns-tcp-queries-received-ipv6: 2983939 dns-udp-responses-sent-ipv4: 2642566650 dns-udp-responses-sent-ipv6: 223985727 dns-tcp-responses-sent-ipv4: 16791130 dns-tcp-responses-sent-ipv6: 1693890