--- service: a.root-servers.net start-period: '2016-07-16T00:00:00Z' end-period: '2016-07-16T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3228997946 dns-udp-queries-received-ipv6: 460646820 dns-tcp-queries-received-ipv4: 37409129 dns-tcp-queries-received-ipv6: 8238951 dns-udp-responses-sent-ipv4: 3220898064 dns-udp-responses-sent-ipv6: 460706857 dns-tcp-responses-sent-ipv4: 32188872 dns-tcp-responses-sent-ipv6: 2618398