--- service: a.root-servers.net start-period: '2015-05-25T00:00:00Z' end-period: '2015-05-25T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2820775219 dns-udp-queries-received-ipv6: 210025378 dns-tcp-queries-received-ipv4: 18245977 dns-tcp-queries-received-ipv6: 3193443 dns-udp-responses-sent-ipv4: 2850458325 dns-udp-responses-sent-ipv6: 212661570 dns-tcp-responses-sent-ipv4: 15888072 dns-tcp-responses-sent-ipv6: 1639341