--- service: a.root-servers.net start-period: '2013-11-20T00:00:00Z' end-period: '2013-11-20T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 1480946185 dns-udp-queries-received-ipv6: 93279623 dns-tcp-queries-received-ipv4: 7672852 dns-tcp-queries-received-ipv6: 1488270 dns-udp-responses-sent-ipv4: 1480447137 dns-udp-responses-sent-ipv6: 93287490 dns-tcp-responses-sent-ipv4: 8241726 dns-tcp-responses-sent-ipv6: 7983