--- version: rssac002v3 service: i.root-servers.net start-period: '2019-04-18T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 7009527987 dns-udp-queries-received-ipv6: 1300025579 dns-tcp-queries-received-ipv4: 121193890 dns-tcp-queries-received-ipv6: 31442058 dns-udp-responses-sent-ipv4: 6874087171 dns-udp-responses-sent-ipv6: 1306827390 dns-tcp-responses-sent-ipv4: 116256897 dns-tcp-responses-sent-ipv6: 29872476