--- version: rssac002v3 service: a.root-servers.net start-period: '2021-09-12T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4761342917 dns-udp-queries-received-ipv6: 1056239478 dns-tcp-queries-received-ipv4: 292672568 dns-tcp-queries-received-ipv6: 94435078 dns-udp-responses-sent-ipv4: 4763289791 dns-udp-responses-sent-ipv6: 1079037822 dns-tcp-responses-sent-ipv4: 280614933 dns-tcp-responses-sent-ipv6: 94318326