--- service: i.root-servers.net start-period: '2014-04-19T00:00:00Z' end-period: '2014-04-20T00:00:02Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2658026380 dns-udp-queries-received-ipv6: 162255062 dns-tcp-queries-received-ipv4: 5763284 dns-tcp-queries-received-ipv6: 237434 dns-udp-responses-sent-ipv4: 2606294762 dns-udp-responses-sent-ipv6: 162447697 dns-tcp-responses-sent-ipv4: 5799068 dns-tcp-responses-sent-ipv6: 239717