--- service: a.root-servers.net start-period: '2017-01-13T00:00:00Z' end-period: '2017-01-13T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4706126027 dns-udp-queries-received-ipv6: 481760229 dns-tcp-queries-received-ipv4: 120061696 dns-tcp-queries-received-ipv6: 10657057 dns-udp-responses-sent-ipv4: 4695598632 dns-udp-responses-sent-ipv6: 481608108 dns-tcp-responses-sent-ipv4: 121013137 dns-tcp-responses-sent-ipv6: 10673442