--- version: rssac002v3 service: i.root-servers.net start-period: '2019-01-01T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 5101957748 dns-udp-queries-received-ipv6: 1051969243 dns-tcp-queries-received-ipv4: 105647548 dns-tcp-queries-received-ipv6: 25386116 dns-udp-responses-sent-ipv4: 5040407148 dns-udp-responses-sent-ipv6: 1052782398 dns-tcp-responses-sent-ipv4: 102331355 dns-tcp-responses-sent-ipv6: 24763750