--- service: a.root-servers.net start-period: '2015-06-05T00:00:00Z' end-period: '2015-06-05T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2754723974 dns-udp-queries-received-ipv6: 238793689 dns-tcp-queries-received-ipv4: 18840256 dns-tcp-queries-received-ipv6: 4211840 dns-udp-responses-sent-ipv4: 2781353534 dns-udp-responses-sent-ipv6: 241287155 dns-tcp-responses-sent-ipv4: 16730322 dns-tcp-responses-sent-ipv6: 2638576