--- service: i.root-servers.net start-period: '2013-07-25T00:00:00Z' end-period: '2013-07-26T00:00:05Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2852969892 dns-udp-queries-received-ipv6: 157277975 dns-tcp-queries-received-ipv4: 5189573 dns-tcp-queries-received-ipv6: 187660 dns-udp-responses-sent-ipv4: 2784530175 dns-udp-responses-sent-ipv6: 156698902 dns-tcp-responses-sent-ipv4: 5126309 dns-tcp-responses-sent-ipv6: 187478