--- service: i.root-servers.net start-period: '2013-12-08T00:00:00Z' end-period: '2013-12-09T00:00:05Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2110191157 dns-udp-queries-received-ipv6: 127703319 dns-tcp-queries-received-ipv4: 4686797 dns-tcp-queries-received-ipv6: 281618 dns-udp-responses-sent-ipv4: 2119763238 dns-udp-responses-sent-ipv6: 134360318 dns-tcp-responses-sent-ipv4: 4709477 dns-tcp-responses-sent-ipv6: 291366