--- service: i.root-servers.net start-period: '2013-11-17T00:00:00Z' end-period: '2013-11-18T00:00:02Z' metric: traffic-volume dns-udp-queries-received-ipv4: 1997112463 dns-udp-queries-received-ipv6: 114830726 dns-tcp-queries-received-ipv4: 4525516 dns-tcp-queries-received-ipv6: 230142 dns-udp-responses-sent-ipv4: 2059904398 dns-udp-responses-sent-ipv6: 124680969 dns-tcp-responses-sent-ipv4: 4545225 dns-tcp-responses-sent-ipv6: 238144