--- service: i.root-servers.net start-period: '2013-12-06T00:00:00Z' end-period: '2013-12-07T00:00:04Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2332275829 dns-udp-queries-received-ipv6: 134393057 dns-tcp-queries-received-ipv4: 5148122 dns-tcp-queries-received-ipv6: 225760 dns-udp-responses-sent-ipv4: 2356579739 dns-udp-responses-sent-ipv6: 144030982 dns-tcp-responses-sent-ipv4: 5179072 dns-tcp-responses-sent-ipv6: 237027