--- service: a.root-servers.net start-period: '2016-12-24T00:00:00Z' end-period: '2016-12-24T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3878592665 dns-udp-queries-received-ipv6: 440520638 dns-tcp-queries-received-ipv4: 169013364 dns-tcp-queries-received-ipv6: 7375182 dns-udp-responses-sent-ipv4: 3876521113 dns-udp-responses-sent-ipv6: 440389246 dns-tcp-responses-sent-ipv4: 169732058 dns-tcp-responses-sent-ipv6: 7398224