--- service: i.root-servers.net start-period: '2014-01-14T00:00:00Z' end-period: '2014-01-15T00:00:04Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2495548622 dns-udp-queries-received-ipv6: 152822475 dns-tcp-queries-received-ipv4: 5223345 dns-tcp-queries-received-ipv6: 246405 dns-udp-responses-sent-ipv4: 2439730119 dns-udp-responses-sent-ipv6: 153005327 dns-tcp-responses-sent-ipv4: 5235596 dns-tcp-responses-sent-ipv6: 250137