--- version: rssac002v3 service: a.root-servers.net start-period: '2019-12-18T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 6479295423 dns-udp-queries-received-ipv6: 972865031 dns-tcp-queries-received-ipv4: 257799115 dns-tcp-queries-received-ipv6: 70667424 dns-udp-responses-sent-ipv4: 6278328194 dns-udp-responses-sent-ipv6: 971206937 dns-tcp-responses-sent-ipv4: 255587124 dns-tcp-responses-sent-ipv6: 70703863