--- service: i.root-servers.net start-period: '2015-05-11T00:00:00Z' end-period: '2015-05-12T00:00:07Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3588319629 dns-udp-queries-received-ipv6: 257783616 dns-tcp-queries-received-ipv4: 11295686 dns-tcp-queries-received-ipv6: 244540 dns-udp-responses-sent-ipv4: 3533110510 dns-udp-responses-sent-ipv6: 260837321 dns-tcp-responses-sent-ipv4: 11338977 dns-tcp-responses-sent-ipv6: 248806