--- service: i.root-servers.net start-period: '2014-01-11T00:00:00Z' end-period: '2014-01-12T00:00:02Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2337362167 dns-udp-queries-received-ipv6: 139765879 dns-tcp-queries-received-ipv4: 4622096 dns-tcp-queries-received-ipv6: 235301 dns-udp-responses-sent-ipv4: 2285302978 dns-udp-responses-sent-ipv6: 139860118 dns-tcp-responses-sent-ipv4: 4637414 dns-tcp-responses-sent-ipv6: 239638