--- version: rssac002v4 service: a.root-servers.net start-period: '2021-12-24T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4979459602 dns-udp-queries-received-ipv6: 1177565705 dns-tcp-queries-received-ipv4: 316985958 dns-tcp-queries-received-ipv6: 49399798 dns-udp-responses-sent-ipv4: 4930625865 dns-udp-responses-sent-ipv6: 1210202616 dns-tcp-responses-sent-ipv4: 286560901 dns-tcp-responses-sent-ipv6: 49379379