--- service: a.root-servers.net start-period: '2016-02-15T00:00:00Z' end-period: '2016-02-15T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 5200779846 dns-udp-queries-received-ipv6: 332404086 dns-tcp-queries-received-ipv4: 73577091 dns-tcp-queries-received-ipv6: 1924874 dns-udp-responses-sent-ipv4: 5196541902 dns-udp-responses-sent-ipv6: 330882791 dns-tcp-responses-sent-ipv4: 64310489 dns-tcp-responses-sent-ipv6: 283971