--- service: j.root-servers.net start-period: '2015-05-18T00:00:00Z' end-period: '2015-05-18T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3550563016 dns-udp-queries-received-ipv6: 273473147 dns-tcp-queries-received-ipv4: 24848170 dns-tcp-queries-received-ipv6: 5387118 dns-udp-responses-sent-ipv4: 3477053061 dns-udp-responses-sent-ipv6: 273337066 dns-tcp-responses-sent-ipv4: 24290165 dns-tcp-responses-sent-ipv6: 4350036