--- service: a.root-servers.net start-period: '2015-12-03T00:00:00Z' end-period: '2015-12-03T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4425803233 dns-udp-queries-received-ipv6: 325287055 dns-tcp-queries-received-ipv4: 33116618 dns-tcp-queries-received-ipv6: 2224996 dns-udp-responses-sent-ipv4: 4425305435 dns-udp-responses-sent-ipv6: 324724174 dns-tcp-responses-sent-ipv4: 28767519 dns-tcp-responses-sent-ipv6: 272580