--- service: i.root-servers.net start-period: '2013-12-01T00:00:00Z' end-period: '2013-12-02T00:00:10Z' metric: traffic-volume dns-udp-queries-received-ipv4: 1911522848 dns-udp-queries-received-ipv6: 122972899 dns-tcp-queries-received-ipv4: 4465056 dns-tcp-queries-received-ipv6: 236946 dns-udp-responses-sent-ipv4: 1970530070 dns-udp-responses-sent-ipv6: 134105749 dns-tcp-responses-sent-ipv4: 4465496 dns-tcp-responses-sent-ipv6: 244820