--- version: rssac002v3 service: i.root-servers.net start-period: '2021-01-22T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 5178267471 dns-udp-queries-received-ipv6: 968368420 dns-tcp-queries-received-ipv4: 499700877 dns-tcp-queries-received-ipv6: 124103582 dns-udp-responses-sent-ipv4: 4082019590 dns-udp-responses-sent-ipv6: 881227364 dns-tcp-responses-sent-ipv4: 364905079 dns-tcp-responses-sent-ipv6: 114678832