Describe the journey of a DNS query from the Opera browser to an authoritative server and back, when Cloudflare DNS is used.

When you type a domain into Opera: 1. Opera checks its local DNS cache. If not found, 2. Opera (or the OS) sends an encrypted DoH request to Cloudflare's DoH server (e.g., 'https://cloudflare-dns.com/dns-query'). 3. Cloudflare's recursive resolver checks its own extensive cache. 4. If not found, Cloudflare queries root DNS servers, then Top-Level Domain (TLD) servers (like '.com'), until it finds the authoritative DNS server for the domain. 5. The authoritative server provides the IP address. 6. Cloudflare stores this in its cache, then sends the IP address back to Opera via the secure DoH connection. 7. Opera then uses this IP address to connect to the website server.