--- version: rssac002v3 service: a.root-servers.net start-period: '2020-12-31T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 5511515596 dns-udp-queries-received-ipv6: 1159140212 dns-tcp-queries-received-ipv4: 305622575 dns-tcp-queries-received-ipv6: 152834758 dns-udp-responses-sent-ipv4: 5344699468 dns-udp-responses-sent-ipv6: 1157115061 dns-tcp-responses-sent-ipv4: 293369338 dns-tcp-responses-sent-ipv6: 153219187