--- service: i.root-servers.net start-period: '2015-03-27T00:00:00Z' end-period: '2015-03-28T00:00:05Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3476910173 dns-udp-queries-received-ipv6: 251859698 dns-tcp-queries-received-ipv4: 9232640 dns-tcp-queries-received-ipv6: 288248 dns-udp-responses-sent-ipv4: 3421628488 dns-udp-responses-sent-ipv6: 255082623 dns-tcp-responses-sent-ipv4: 9233055 dns-tcp-responses-sent-ipv6: 293455