--- service: a.root-servers.net start-period: '2017-01-15T00:00:00Z' end-period: '2017-01-15T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3877351619 dns-udp-queries-received-ipv6: 455297928 dns-tcp-queries-received-ipv4: 128639518 dns-tcp-queries-received-ipv6: 9385680 dns-udp-responses-sent-ipv4: 4345344131 dns-udp-responses-sent-ipv6: 455131777 dns-tcp-responses-sent-ipv4: 129788130 dns-tcp-responses-sent-ipv6: 9383001