--- version: rssac002v3 service: a.root-servers.net start-period: '2018-06-21T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 5837217278 dns-udp-queries-received-ipv6: 419185342 dns-tcp-queries-received-ipv4: 140464528 dns-tcp-queries-received-ipv6: 18032068 dns-udp-responses-sent-ipv4: 5703781283 dns-udp-responses-sent-ipv6: 418851198 dns-tcp-responses-sent-ipv4: 141804224 dns-tcp-responses-sent-ipv6: 18030653