--- service: i.root-servers.net start-period: '2015-03-30T00:00:00Z' end-period: '2015-03-31T00:00:01Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3604189513 dns-udp-queries-received-ipv6: 249113269 dns-tcp-queries-received-ipv4: 8651335 dns-tcp-queries-received-ipv6: 281159 dns-udp-responses-sent-ipv4: 3548742023 dns-udp-responses-sent-ipv6: 252285008 dns-tcp-responses-sent-ipv4: 8688107 dns-tcp-responses-sent-ipv6: 285707