--- version: rssac002v3 service: m.root-servers.net start-period: '2019-03-31T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3098764964 dns-udp-queries-received-ipv6: 685344987 dns-udp-responses-sent-ipv4: 2991818302 dns-udp-responses-sent-ipv6: 633122976 dns-tcp-queries-received-ipv4: 153222267 dns-tcp-queries-received-ipv6: 42643147 dns-tcp-responses-sent-ipv4: 153502120 dns-tcp-responses-sent-ipv6: 42731668