--- version: rssac002v4 service: a.root-servers.net start-period: '2021-12-10T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 5187823904 dns-udp-queries-received-ipv6: 1269262193 dns-tcp-queries-received-ipv4: 280919427 dns-tcp-queries-received-ipv6: 57016863 dns-udp-responses-sent-ipv4: 5478516759 dns-udp-responses-sent-ipv6: 1317523422 dns-tcp-responses-sent-ipv4: 277740986 dns-tcp-responses-sent-ipv6: 56977856