--- version: rssac002v3 service: i.root-servers.net start-period: '2021-04-09T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4755564743 dns-udp-queries-received-ipv6: 913123136 dns-tcp-queries-received-ipv4: 413795751 dns-tcp-queries-received-ipv6: 132280950 dns-udp-responses-sent-ipv4: 4010343920 dns-udp-responses-sent-ipv6: 859529215 dns-tcp-responses-sent-ipv4: 346570382 dns-tcp-responses-sent-ipv6: 134794332