--- service: a.root-servers.net start-period: '2017-02-23T00:00:00Z' end-period: '2017-02-23T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4480830959 dns-udp-queries-received-ipv6: 489213965 dns-tcp-queries-received-ipv4: 191826512 dns-tcp-queries-received-ipv6: 9275317 dns-udp-responses-sent-ipv4: 4467864101 dns-udp-responses-sent-ipv6: 489157932 dns-tcp-responses-sent-ipv4: 190612298 dns-tcp-responses-sent-ipv6: 9344639