--- service: i.root-servers.net start-period: '2015-05-09T00:00:00Z' end-period: '2015-05-10T00:00:04Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3221791391 dns-udp-queries-received-ipv6: 234408298 dns-tcp-queries-received-ipv4: 10401359 dns-tcp-queries-received-ipv6: 252010 dns-udp-responses-sent-ipv4: 3174083303 dns-udp-responses-sent-ipv6: 237348064 dns-tcp-responses-sent-ipv4: 10495788 dns-tcp-responses-sent-ipv6: 257095