--- version: rssac002v3 service: a.root-servers.net start-period: '2019-12-20T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 6421345953 dns-udp-queries-received-ipv6: 937573497 dns-tcp-queries-received-ipv4: 244056238 dns-tcp-queries-received-ipv6: 68446022 dns-udp-responses-sent-ipv4: 6227073552 dns-udp-responses-sent-ipv6: 934604524 dns-tcp-responses-sent-ipv4: 241394330 dns-tcp-responses-sent-ipv6: 68601694