--- version: rssac002v3 service: a.root-servers.net start-period: '2018-06-29T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3947210530 dns-udp-queries-received-ipv6: 463676609 dns-tcp-queries-received-ipv4: 125132560 dns-tcp-queries-received-ipv6: 17966546 dns-udp-responses-sent-ipv4: 3812609227 dns-udp-responses-sent-ipv6: 463315789 dns-tcp-responses-sent-ipv4: 126274217 dns-tcp-responses-sent-ipv6: 18037978