--- service: a.root-servers.net start-period: '2013-12-05T00:00:00Z' end-period: '2013-12-05T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 1520863523 dns-udp-queries-received-ipv6: 76520864 dns-tcp-queries-received-ipv4: 8829470 dns-tcp-queries-received-ipv6: 1248445 dns-udp-responses-sent-ipv4: 1517217952 dns-udp-responses-sent-ipv6: 76528013 dns-tcp-responses-sent-ipv4: 9270730 dns-tcp-responses-sent-ipv6: 167