--- version: rssac002v3 service: a.root-servers.net start-period: '2021-02-06T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 5335099818 dns-udp-queries-received-ipv6: 992597072 dns-tcp-queries-received-ipv4: 281262269 dns-tcp-queries-received-ipv6: 106738361 dns-udp-responses-sent-ipv4: 5160369573 dns-udp-responses-sent-ipv6: 991220963 dns-tcp-responses-sent-ipv4: 273392867 dns-tcp-responses-sent-ipv6: 107051196