--- service: i.root-servers.net start-period: '2014-12-22T00:00:00Z' end-period: '2014-12-23T00:00:04Z' metric: traffic-volume dns-udp-queries-received-ipv4: 8131991803 dns-udp-queries-received-ipv6: 210819884 dns-tcp-queries-received-ipv4: 7824391 dns-tcp-queries-received-ipv6: 220573 dns-udp-responses-sent-ipv4: 5106543814 dns-udp-responses-sent-ipv6: 211045911 dns-tcp-responses-sent-ipv4: 8000731 dns-tcp-responses-sent-ipv6: 219772