--- version: rssac002v3 service: a.root-servers.net start-period: '2019-03-22T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 6119361158 dns-udp-queries-received-ipv6: 839089365 dns-tcp-queries-received-ipv4: 212784111 dns-tcp-queries-received-ipv6: 35103182 dns-udp-responses-sent-ipv4: 5991441457 dns-udp-responses-sent-ipv6: 838565319 dns-tcp-responses-sent-ipv4: 208563652 dns-tcp-responses-sent-ipv6: 33785639