--- version: rssac002v3 service: a.root-servers.net start-period: '2019-03-08T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 6165777907 dns-udp-queries-received-ipv6: 808740037 dns-tcp-queries-received-ipv4: 189885033 dns-tcp-queries-received-ipv6: 35667511 dns-udp-responses-sent-ipv4: 6047372015 dns-udp-responses-sent-ipv6: 808185035 dns-tcp-responses-sent-ipv4: 186075853 dns-tcp-responses-sent-ipv6: 33340144