--- service: a.root-servers.net start-period: '2014-01-20T00:00:00Z' end-period: '2014-01-20T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 1408417295 dns-udp-queries-received-ipv6: 48902996 dns-tcp-queries-received-ipv4: 7796788 dns-tcp-queries-received-ipv6: 1140656 dns-udp-responses-sent-ipv4: 1407881303 dns-udp-responses-sent-ipv6: 48900363 dns-tcp-responses-sent-ipv4: 7789865 dns-tcp-responses-sent-ipv6: 68