--- service: i.root-servers.net start-period: '2014-07-11T00:00:00Z' end-period: '2014-07-12T00:00:02Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4815584981 dns-udp-queries-received-ipv6: 293403678 dns-tcp-queries-received-ipv4: 13200656 dns-tcp-queries-received-ipv6: 403434 dns-udp-responses-sent-ipv4: 4755319379 dns-udp-responses-sent-ipv6: 293322246 dns-tcp-responses-sent-ipv4: 13138004 dns-tcp-responses-sent-ipv6: 403612