--- version: rssac002v3 service: a.root-servers.net start-period: '2019-07-09T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 6286303958 dns-udp-queries-received-ipv6: 1239137110 dns-tcp-queries-received-ipv4: 170231191 dns-tcp-queries-received-ipv6: 33158927 dns-udp-responses-sent-ipv4: 6139812242 dns-udp-responses-sent-ipv6: 1237902487 dns-tcp-responses-sent-ipv4: 166162652 dns-tcp-responses-sent-ipv6: 34071667