--- service: a.root-servers.net start-period: '2017-02-15T00:00:00Z' end-period: '2017-02-15T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4883250673 dns-udp-queries-received-ipv6: 494231322 dns-tcp-queries-received-ipv4: 190555273 dns-tcp-queries-received-ipv6: 8911730 dns-udp-responses-sent-ipv4: 4877947625 dns-udp-responses-sent-ipv6: 494049767 dns-tcp-responses-sent-ipv4: 191051781 dns-tcp-responses-sent-ipv6: 8954889