--- service: i.root-servers.net start-period: '2013-08-17T00:00:00Z' end-period: '2013-08-18T00:00:05Z' metric: traffic-volume dns-udp-queries-received-ipv4: 1843098657 dns-udp-queries-received-ipv6: 130391758 dns-tcp-queries-received-ipv4: 4451055 dns-tcp-queries-received-ipv6: 156094 dns-udp-responses-sent-ipv4: 1808550993 dns-udp-responses-sent-ipv6: 130366300 dns-tcp-responses-sent-ipv4: 4446108 dns-tcp-responses-sent-ipv6: 159087