--- service: i.root-servers.net start-period: '2014-12-13T00:00:00Z' end-period: '2014-12-14T00:00:09Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2855346544 dns-udp-queries-received-ipv6: 197685070 dns-tcp-queries-received-ipv4: 5980979 dns-tcp-queries-received-ipv6: 176977 dns-udp-responses-sent-ipv4: 2837251845 dns-udp-responses-sent-ipv6: 198585754 dns-tcp-responses-sent-ipv4: 6034609 dns-tcp-responses-sent-ipv6: 178985