--- service: a.root-servers.net start-period: '2014-01-18T00:00:00Z' end-period: '2014-01-18T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 1236696143 dns-udp-queries-received-ipv6: 44604977 dns-tcp-queries-received-ipv4: 6681627 dns-tcp-queries-received-ipv6: 1066578 dns-udp-responses-sent-ipv4: 1233886457 dns-udp-responses-sent-ipv6: 44605792 dns-tcp-responses-sent-ipv4: 6650167 dns-tcp-responses-sent-ipv6: 74