--- service: j.root-servers.net start-period: '2014-04-21T00:00:00Z' end-period: '2014-04-21T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2569324852 dns-udp-queries-received-ipv6: 203487159 dns-tcp-queries-received-ipv4: 21687065 dns-tcp-queries-received-ipv6: 4653052 dns-udp-responses-sent-ipv4: 2544711205 dns-udp-responses-sent-ipv6: 203346527 dns-tcp-responses-sent-ipv4: 20687787 dns-tcp-responses-sent-ipv6: 202