--- service: a.root-servers.net start-period: '2015-12-07T00:00:00Z' end-period: '2015-12-07T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4550686036 dns-udp-queries-received-ipv6: 315956870 dns-tcp-queries-received-ipv4: 46542612 dns-tcp-queries-received-ipv6: 2135064 dns-udp-responses-sent-ipv4: 4532454919 dns-udp-responses-sent-ipv6: 316889186 dns-tcp-responses-sent-ipv4: 38872525 dns-tcp-responses-sent-ipv6: 274257