--- version: rssac002v3 service: a.root-servers.net start-period: '2019-06-25T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 6026076000 dns-udp-queries-received-ipv6: 1301970488 dns-tcp-queries-received-ipv4: 167049274 dns-tcp-queries-received-ipv6: 31878507 dns-udp-responses-sent-ipv4: 5887047720 dns-udp-responses-sent-ipv6: 1300877408 dns-tcp-responses-sent-ipv4: 164096781 dns-tcp-responses-sent-ipv6: 32621263