--- service: i.root-servers.net start-period: '2014-07-19T00:00:00Z' end-period: '2014-07-20T00:00:02Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2752336030 dns-udp-queries-received-ipv6: 228502780 dns-tcp-queries-received-ipv4: 7421445 dns-tcp-queries-received-ipv6: 240324 dns-udp-responses-sent-ipv4: 2701417564 dns-udp-responses-sent-ipv6: 228369644 dns-tcp-responses-sent-ipv4: 7517034 dns-tcp-responses-sent-ipv6: 243551