--- service: a.root-servers.net start-period: '2017-02-01T00:00:00Z' end-period: '2017-02-01T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4616985572 dns-udp-queries-received-ipv6: 500192618 dns-tcp-queries-received-ipv4: 148532372 dns-tcp-queries-received-ipv6: 8457268 dns-udp-responses-sent-ipv4: 4612166475 dns-udp-responses-sent-ipv6: 500049470 dns-tcp-responses-sent-ipv4: 149120115 dns-tcp-responses-sent-ipv6: 8491684