--- service: i.root-servers.net start-period: '2015-03-02T00:00:00Z' end-period: '2015-03-03T00:00:04Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3522743506 dns-udp-queries-received-ipv6: 253877009 dns-tcp-queries-received-ipv4: 7902387 dns-tcp-queries-received-ipv6: 217450 dns-udp-responses-sent-ipv4: 3473559816 dns-udp-responses-sent-ipv6: 253839737 dns-tcp-responses-sent-ipv4: 7950767 dns-tcp-responses-sent-ipv6: 223630