--- service: i.root-servers.net start-period: '2015-01-14T00:00:00Z' end-period: '2015-01-15T00:00:05Z' metric: traffic-volume dns-udp-queries-received-ipv4: 9354332774 dns-udp-queries-received-ipv6: 501644901 dns-tcp-queries-received-ipv4: 47064082 dns-tcp-queries-received-ipv6: 1124542 dns-udp-responses-sent-ipv4: 9102225024 dns-udp-responses-sent-ipv6: 499858155 dns-tcp-responses-sent-ipv4: 45161088 dns-tcp-responses-sent-ipv6: 1081474