--- version: rssac002v4 service: a.root-servers.net start-period: '2021-12-11T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4778317197 dns-udp-queries-received-ipv6: 1159167835 dns-tcp-queries-received-ipv4: 264064911 dns-tcp-queries-received-ipv6: 51212278 dns-udp-responses-sent-ipv4: 5026086670 dns-udp-responses-sent-ipv6: 1191362531 dns-tcp-responses-sent-ipv4: 260003540 dns-tcp-responses-sent-ipv6: 51247549