--- service: a.root-servers.net start-period: '2015-10-20T00:00:00Z' end-period: '2015-10-20T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3266372992 dns-udp-queries-received-ipv6: 303482178 dns-tcp-queries-received-ipv4: 22958097 dns-tcp-queries-received-ipv6: 4855172 dns-udp-responses-sent-ipv4: 3273515682 dns-udp-responses-sent-ipv6: 303230251 dns-tcp-responses-sent-ipv4: 19874344 dns-tcp-responses-sent-ipv6: 2760889