--- service: a.root-servers.net start-period: '2016-02-29T00:00:00Z' end-period: '2016-02-29T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4706272322 dns-udp-queries-received-ipv6: 354442294 dns-tcp-queries-received-ipv4: 36344696 dns-tcp-queries-received-ipv6: 3279769 dns-udp-responses-sent-ipv4: 4696990531 dns-udp-responses-sent-ipv6: 355030688 dns-tcp-responses-sent-ipv4: 31574664 dns-tcp-responses-sent-ipv6: 272428