--- version: rssac002v3 service: a.root-servers.net start-period: '2021-09-21T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 5315749700 dns-udp-queries-received-ipv6: 1240760135 dns-tcp-queries-received-ipv4: 335907660 dns-tcp-queries-received-ipv6: 97834270 dns-udp-responses-sent-ipv4: 5274397983 dns-udp-responses-sent-ipv6: 1278200254 dns-tcp-responses-sent-ipv4: 317506744 dns-tcp-responses-sent-ipv6: 97856620