--- service: i.root-servers.net start-period: '2015-03-26T00:00:00Z' end-period: '2015-03-27T00:00:04Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3543135362 dns-udp-queries-received-ipv6: 253731906 dns-tcp-queries-received-ipv4: 8998866 dns-tcp-queries-received-ipv6: 282040 dns-udp-responses-sent-ipv4: 3489413094 dns-udp-responses-sent-ipv6: 257131658 dns-tcp-responses-sent-ipv4: 9003691 dns-tcp-responses-sent-ipv6: 285670