--- service: i.root-servers.net start-period: '2016-01-06T00:00:00Z' end-period: '2016-01-07T00:00:01Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4630617967 dns-udp-queries-received-ipv6: 373929659 dns-tcp-queries-received-ipv4: 20951404 dns-tcp-queries-received-ipv6: 856739 dns-udp-responses-sent-ipv4: 4565256994 dns-udp-responses-sent-ipv6: 374374023 dns-tcp-responses-sent-ipv4: 20943760 dns-tcp-responses-sent-ipv6: 862484