--- version: rssac002v3 service: i.root-servers.net start-period: '2018-12-20T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 5904204410 dns-udp-queries-received-ipv6: 1106524731 dns-tcp-queries-received-ipv4: 133317428 dns-tcp-queries-received-ipv6: 30226362 dns-udp-responses-sent-ipv4: 5834438874 dns-udp-responses-sent-ipv6: 1114407754 dns-tcp-responses-sent-ipv4: 129709245 dns-tcp-responses-sent-ipv6: 29656202