--- service: a.root-servers.net start-period: '2015-01-15T00:00:00Z' end-period: '2015-01-15T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2908947298 dns-udp-queries-received-ipv6: 214402430 dns-tcp-queries-received-ipv4: 15761610 dns-tcp-queries-received-ipv6: 2517380 dns-udp-responses-sent-ipv4: 2908375476 dns-udp-responses-sent-ipv6: 214305714 dns-tcp-responses-sent-ipv4: 14448494 dns-tcp-responses-sent-ipv6: 1608262