--- service: a.root-servers.net start-period: '2015-12-28T00:00:00Z' end-period: '2015-12-28T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3814113026 dns-udp-queries-received-ipv6: 208908705 dns-tcp-queries-received-ipv4: 27650646 dns-tcp-queries-received-ipv6: 1608952 dns-udp-responses-sent-ipv4: 3805791856 dns-udp-responses-sent-ipv6: 208780072 dns-tcp-responses-sent-ipv4: 23213919 dns-tcp-responses-sent-ipv6: 173648