--- service: a.root-servers.net start-period: '2013-12-17T00:00:00Z' end-period: '2013-12-17T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 1396887534 dns-udp-queries-received-ipv6: 59684482 dns-tcp-queries-received-ipv4: 7196154 dns-tcp-queries-received-ipv6: 1248757 dns-udp-responses-sent-ipv4: 1393673068 dns-udp-responses-sent-ipv6: 59688000 dns-tcp-responses-sent-ipv4: 7669958 dns-tcp-responses-sent-ipv6: 134