--- version: rssac002v3 service: a.root-servers.net start-period: '2019-03-04T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 6291040732 dns-udp-queries-received-ipv6: 845522164 dns-tcp-queries-received-ipv4: 175805300 dns-tcp-queries-received-ipv6: 35445043 dns-udp-responses-sent-ipv4: 6167382229 dns-udp-responses-sent-ipv6: 844873878 dns-tcp-responses-sent-ipv4: 172108201 dns-tcp-responses-sent-ipv6: 32909990