--- service: i.root-servers.net start-period: '2015-02-13T00:00:00Z' end-period: '2015-02-14T00:00:03Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3461636657 dns-udp-queries-received-ipv6: 255389230 dns-tcp-queries-received-ipv4: 7643484 dns-tcp-queries-received-ipv6: 218511 dns-udp-responses-sent-ipv4: 3410614686 dns-udp-responses-sent-ipv6: 255345019 dns-tcp-responses-sent-ipv4: 7639272 dns-tcp-responses-sent-ipv6: 229796