--- service: i.root-servers.net start-period: '2015-04-28T00:00:00Z' end-period: '2015-04-29T00:00:34Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3836398726 dns-udp-queries-received-ipv6: 261924396 dns-tcp-queries-received-ipv4: 11087875 dns-tcp-queries-received-ipv6: 292386 dns-udp-responses-sent-ipv4: 3778685525 dns-udp-responses-sent-ipv6: 261835736 dns-tcp-responses-sent-ipv4: 11135979 dns-tcp-responses-sent-ipv6: 296378