--- version: rssac002v3 service: i.root-servers.net start-period: '2019-03-11T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 7489642200 dns-udp-queries-received-ipv6: 1351388515 dns-tcp-queries-received-ipv4: 140065722 dns-tcp-queries-received-ipv6: 34159448 dns-udp-responses-sent-ipv4: 7569640165 dns-udp-responses-sent-ipv6: 1384339923 dns-tcp-responses-sent-ipv4: 135331922 dns-tcp-responses-sent-ipv6: 31609482