--- service: i.root-servers.net start-period: '2016-01-04T00:00:00Z' end-period: '2016-01-05T00:00:02Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4623670383 dns-udp-queries-received-ipv6: 374057630 dns-tcp-queries-received-ipv4: 22612943 dns-tcp-queries-received-ipv6: 839262 dns-udp-responses-sent-ipv4: 4561555670 dns-udp-responses-sent-ipv6: 376018654 dns-tcp-responses-sent-ipv4: 22525427 dns-tcp-responses-sent-ipv6: 845256