--- service: a.root-servers.net start-period: '2014-07-19T00:00:00Z' end-period: '2014-07-19T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 1374867364 dns-udp-queries-received-ipv6: 76960502 dns-tcp-queries-received-ipv4: 12077476 dns-tcp-queries-received-ipv6: 1147154 dns-udp-responses-sent-ipv4: 1374809010 dns-udp-responses-sent-ipv6: 76971188 dns-tcp-responses-sent-ipv4: 12222836 dns-tcp-responses-sent-ipv6: 492862