--- service: i.root-servers.net start-period: '2013-06-06T00:00:00Z' end-period: '2013-06-07T00:00:01Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2260468108 dns-udp-queries-received-ipv6: 106840197 dns-tcp-queries-received-ipv4: 3776246 dns-tcp-queries-received-ipv6: 168019 dns-udp-responses-sent-ipv4: 2266296783 dns-udp-responses-sent-ipv6: 114079422 dns-tcp-responses-sent-ipv4: 3968101 dns-tcp-responses-sent-ipv6: 170157