--- service: a.root-servers.net start-period: '2016-08-19T00:00:00Z' end-period: '2016-08-19T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3522469814 dns-udp-queries-received-ipv6: 476504913 dns-tcp-queries-received-ipv4: 50815172 dns-tcp-queries-received-ipv6: 5661772 dns-udp-responses-sent-ipv4: 3514531874 dns-udp-responses-sent-ipv6: 476560950 dns-tcp-responses-sent-ipv4: 49349564 dns-tcp-responses-sent-ipv6: 4093318