--- service: a.root-servers.net start-period: '2013-10-18T00:00:00Z' end-period: '2013-10-18T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 1459509430 dns-udp-queries-received-ipv6: 88987340 dns-tcp-queries-received-ipv4: 7477126 dns-tcp-queries-received-ipv6: 1538885 dns-udp-responses-sent-ipv4: 1456850793 dns-udp-responses-sent-ipv6: 88998202 dns-tcp-responses-sent-ipv4: 7940628 dns-tcp-responses-sent-ipv6: 17359