--- service: a.root-servers.net start-period: '2015-01-02T00:00:00Z' end-period: '2015-01-02T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2655275972 dns-udp-queries-received-ipv6: 190791725 dns-tcp-queries-received-ipv4: 16910587 dns-tcp-queries-received-ipv6: 2255203 dns-udp-responses-sent-ipv4: 2654887625 dns-udp-responses-sent-ipv6: 190757887 dns-tcp-responses-sent-ipv4: 15778503 dns-tcp-responses-sent-ipv6: 1572576