--- version: rssac002v3 service: i.root-servers.net start-period: '2019-01-02T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 5733351552 dns-udp-queries-received-ipv6: 1141207262 dns-tcp-queries-received-ipv4: 129260058 dns-tcp-queries-received-ipv6: 33574550 dns-udp-responses-sent-ipv4: 5614868217 dns-udp-responses-sent-ipv6: 1130365408 dns-tcp-responses-sent-ipv4: 123763270 dns-tcp-responses-sent-ipv6: 31203519