--- version: rssac002v4 service: a.root-servers.net start-period: '2021-11-23T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 5036075015 dns-udp-queries-received-ipv6: 1270461452 dns-tcp-queries-received-ipv4: 259990970 dns-tcp-queries-received-ipv6: 57855562 dns-udp-responses-sent-ipv4: 5291784127 dns-udp-responses-sent-ipv6: 1324354912 dns-tcp-responses-sent-ipv4: 255640878 dns-tcp-responses-sent-ipv6: 57739614