--- version: rssac002v3 service: i.root-servers.net start-period: '2019-01-15T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 6518472817 dns-udp-queries-received-ipv6: 1226322387 dns-tcp-queries-received-ipv4: 146524828 dns-tcp-queries-received-ipv6: 36891771 dns-udp-responses-sent-ipv4: 6434425135 dns-udp-responses-sent-ipv6: 1218285483 dns-tcp-responses-sent-ipv4: 140181553 dns-tcp-responses-sent-ipv6: 34094210