--- version: rssac002v4 service: a.root-servers.net start-period: '2021-10-21T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 5252733589 dns-udp-queries-received-ipv6: 1264929105 dns-tcp-queries-received-ipv4: 295188489 dns-tcp-queries-received-ipv6: 74326128 dns-udp-responses-sent-ipv4: 5103512096 dns-udp-responses-sent-ipv6: 1263154606 dns-tcp-responses-sent-ipv4: 291661028 dns-tcp-responses-sent-ipv6: 74762381