--- service: a.root-servers.net start-period: '2016-04-20T00:00:00Z' end-period: '2016-04-20T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 5341079839 dns-udp-queries-received-ipv6: 353795688 dns-tcp-queries-received-ipv4: 71716236 dns-tcp-queries-received-ipv6: 3558509 dns-udp-responses-sent-ipv4: 5340821872 dns-udp-responses-sent-ipv6: 353489624 dns-tcp-responses-sent-ipv4: 60648138 dns-tcp-responses-sent-ipv6: 294329