--- service: a.root-servers.net start-period: '2017-02-28T00:00:00Z' end-period: '2017-02-28T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4985472852 dns-udp-queries-received-ipv6: 493899172 dns-tcp-queries-received-ipv4: 189487166 dns-tcp-queries-received-ipv6: 9685656 dns-udp-responses-sent-ipv4: 4981127173 dns-udp-responses-sent-ipv6: 493833685 dns-tcp-responses-sent-ipv4: 189838451 dns-tcp-responses-sent-ipv6: 9796122