--- version: rssac002v3 service: i.root-servers.net start-period: '2019-04-23T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 6631792702 dns-udp-queries-received-ipv6: 1273123236 dns-tcp-queries-received-ipv4: 129823036 dns-tcp-queries-received-ipv6: 28742085 dns-udp-responses-sent-ipv4: 6522066559 dns-udp-responses-sent-ipv6: 1296307658 dns-tcp-responses-sent-ipv4: 125291500 dns-tcp-responses-sent-ipv6: 27790452