--- version: rssac002v4 service: a.root-servers.net start-period: '2021-12-29T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 5151801800 dns-udp-queries-received-ipv6: 1320698401 dns-tcp-queries-received-ipv4: 320219721 dns-tcp-queries-received-ipv6: 90817313 dns-udp-responses-sent-ipv4: 5182002036 dns-udp-responses-sent-ipv6: 1385060117 dns-tcp-responses-sent-ipv4: 295390067 dns-tcp-responses-sent-ipv6: 90750259