--- service: a.root-servers.net start-period: '2015-08-20T00:00:00Z' end-period: '2015-08-20T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3538415061 dns-udp-queries-received-ipv6: 189659079 dns-tcp-queries-received-ipv4: 16164515 dns-tcp-queries-received-ipv6: 8475303 dns-udp-responses-sent-ipv4: 3788610999 dns-udp-responses-sent-ipv6: 195398199 dns-tcp-responses-sent-ipv4: 13319797 dns-tcp-responses-sent-ipv6: 6906663