--- version: rssac002v3 service: i.root-servers.net start-period: '2021-05-01T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 5203501585 dns-udp-queries-received-ipv6: 954293974 dns-tcp-queries-received-ipv4: 441791431 dns-tcp-queries-received-ipv6: 152481091 dns-udp-responses-sent-ipv4: 3848504015 dns-udp-responses-sent-ipv6: 817708591 dns-tcp-responses-sent-ipv4: 370073456 dns-tcp-responses-sent-ipv6: 118978900