--- service: a.root-servers.net start-period: '2015-09-25T00:00:00Z' end-period: '2015-09-25T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3388779091 dns-udp-queries-received-ipv6: 295266290 dns-tcp-queries-received-ipv4: 21010894 dns-tcp-queries-received-ipv6: 11014096 dns-udp-responses-sent-ipv4: 3387328322 dns-udp-responses-sent-ipv6: 293743991 dns-tcp-responses-sent-ipv4: 18010145 dns-tcp-responses-sent-ipv6: 9375966