--- version: rssac002v4 service: a.root-servers.net start-period: '2021-12-02T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 5216799101 dns-udp-queries-received-ipv6: 1601841459 dns-tcp-queries-received-ipv4: 327153568 dns-tcp-queries-received-ipv6: 225358896 dns-udp-responses-sent-ipv4: 5384556954 dns-udp-responses-sent-ipv6: 1720777997 dns-tcp-responses-sent-ipv4: 323390871 dns-tcp-responses-sent-ipv6: 224918633