--- version: rssac002v3 service: a.root-servers.net start-period: '2019-05-09T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 5938134927 dns-udp-queries-received-ipv6: 936122194 dns-tcp-queries-received-ipv4: 196757589 dns-tcp-queries-received-ipv6: 29395317 dns-udp-responses-sent-ipv4: 5804769149 dns-udp-responses-sent-ipv6: 935612418 dns-tcp-responses-sent-ipv4: 193216943 dns-tcp-responses-sent-ipv6: 30096714