--- version: rssac002v3 service: m.root-servers.net start-period: '2019-04-08T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3602063622 dns-udp-queries-received-ipv6: 686947087 dns-udp-responses-sent-ipv4: 3343813317 dns-udp-responses-sent-ipv6: 643863187 dns-tcp-queries-received-ipv4: 164152393 dns-tcp-queries-received-ipv6: 43879002 dns-tcp-responses-sent-ipv4: 163606057 dns-tcp-responses-sent-ipv6: 43936556