--- service: a.root-servers.net start-period: '2015-11-23T00:00:00Z' end-period: '2015-11-23T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3301903585 dns-udp-queries-received-ipv6: 281864778 dns-tcp-queries-received-ipv4: 20458945 dns-tcp-queries-received-ipv6: 1659470 dns-udp-responses-sent-ipv4: 3301845268 dns-udp-responses-sent-ipv6: 281722078 dns-tcp-responses-sent-ipv4: 17249039 dns-tcp-responses-sent-ipv6: 263577