--- service: a.root-servers.net start-period: '2017-02-12T00:00:00Z' end-period: '2017-02-12T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4271395458 dns-udp-queries-received-ipv6: 454060066 dns-tcp-queries-received-ipv4: 145439561 dns-tcp-queries-received-ipv6: 7230851 dns-udp-responses-sent-ipv4: 4264875998 dns-udp-responses-sent-ipv6: 453961269 dns-tcp-responses-sent-ipv4: 146107090 dns-tcp-responses-sent-ipv6: 7259360