--- service: a.root-servers.net start-period: '2015-11-13T00:00:00Z' end-period: '2015-11-13T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3535451582 dns-udp-queries-received-ipv6: 311121061 dns-tcp-queries-received-ipv4: 19607068 dns-tcp-queries-received-ipv6: 2137530 dns-udp-responses-sent-ipv4: 3531866492 dns-udp-responses-sent-ipv6: 310639568 dns-tcp-responses-sent-ipv4: 17290401 dns-tcp-responses-sent-ipv6: 262521