--- version: rssac002v3 service: i.root-servers.net start-period: '2019-05-01T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 6638125544 dns-udp-queries-received-ipv6: 1363182853 dns-tcp-queries-received-ipv4: 124761162 dns-tcp-queries-received-ipv6: 25133747 dns-udp-responses-sent-ipv4: 6474000436 dns-udp-responses-sent-ipv6: 1361020107 dns-tcp-responses-sent-ipv4: 120336386 dns-tcp-responses-sent-ipv6: 24370238