--- version: rssac002v3 service: i.root-servers.net start-period: '2019-04-09T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 7090213360 dns-udp-queries-received-ipv6: 1232450917 dns-tcp-queries-received-ipv4: 130561811 dns-tcp-queries-received-ipv6: 29312228 dns-udp-responses-sent-ipv4: 6988715593 dns-udp-responses-sent-ipv6: 1262181778 dns-tcp-responses-sent-ipv4: 126486795 dns-tcp-responses-sent-ipv6: 28273432