--- service: i.root-servers.net start-period: '2013-06-13T00:00:00Z' end-period: '2013-06-14T00:00:01Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2027960235 dns-udp-queries-received-ipv6: 106692203 dns-tcp-queries-received-ipv4: 3936835 dns-tcp-queries-received-ipv6: 153638 dns-udp-responses-sent-ipv4: 2035148413 dns-udp-responses-sent-ipv6: 113214655 dns-tcp-responses-sent-ipv4: 4102180 dns-tcp-responses-sent-ipv6: 155491