--- service: a.root-servers.net start-period: '2013-12-10T00:00:00Z' end-period: '2013-12-10T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 1452701748 dns-udp-queries-received-ipv6: 75104859 dns-tcp-queries-received-ipv4: 8354503 dns-tcp-queries-received-ipv6: 1407825 dns-udp-responses-sent-ipv4: 1449317426 dns-udp-responses-sent-ipv6: 75113162 dns-tcp-responses-sent-ipv4: 8638669 dns-tcp-responses-sent-ipv6: 150