--- service: i.root-servers.net start-period: '2013-11-12T00:00:00Z' end-period: '2013-11-13T00:00:02Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2399533650 dns-udp-queries-received-ipv6: 127727794 dns-tcp-queries-received-ipv4: 5047726 dns-tcp-queries-received-ipv6: 227518 dns-udp-responses-sent-ipv4: 2480038100 dns-udp-responses-sent-ipv6: 140648813 dns-tcp-responses-sent-ipv4: 5065798 dns-tcp-responses-sent-ipv6: 235675