--- service: j.root-servers.net start-period: '2015-03-21T00:00:00Z' end-period: '2015-03-21T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3076099044 dns-udp-queries-received-ipv6: 312780942 dns-tcp-queries-received-ipv4: 27564026 dns-tcp-queries-received-ipv6: 4630470 dns-udp-responses-sent-ipv4: 3073276834 dns-udp-responses-sent-ipv6: 312694795 dns-tcp-responses-sent-ipv4: 27161459 dns-tcp-responses-sent-ipv6: 3913618