--- service: i.root-servers.net start-period: '2013-09-25T00:00:00Z' end-period: '2013-09-26T00:00:01Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2377449766 dns-udp-queries-received-ipv6: 147522310 dns-tcp-queries-received-ipv4: 5871971 dns-tcp-queries-received-ipv6: 123867 dns-udp-responses-sent-ipv4: 2445066740 dns-udp-responses-sent-ipv6: 156157379 dns-tcp-responses-sent-ipv4: 5883149 dns-tcp-responses-sent-ipv6: 144749