--- version: rssac002v3 service: i.root-servers.net start-period: '2021-03-31T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4678990136 dns-udp-queries-received-ipv6: 1076970261 dns-tcp-queries-received-ipv4: 455078718 dns-tcp-queries-received-ipv6: 157613086 dns-udp-responses-sent-ipv4: 3871012937 dns-udp-responses-sent-ipv6: 942838416 dns-tcp-responses-sent-ipv4: 364766269 dns-tcp-responses-sent-ipv6: 147846004