--- version: rssac002v3 service: a.root-servers.net start-period: '2019-07-15T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 6151937008 dns-udp-queries-received-ipv6: 1162695950 dns-tcp-queries-received-ipv4: 187912176 dns-tcp-queries-received-ipv6: 37204175 dns-udp-responses-sent-ipv4: 6001556979 dns-udp-responses-sent-ipv6: 1161764887 dns-tcp-responses-sent-ipv4: 183795738 dns-tcp-responses-sent-ipv6: 38675089