The network is like the sea—vast and complex. If you're interested in networking, I remember from my studies that I got the CCNA certification. (CCNA, or Cisco Certified Network Associate, is a certification that validates your knowledge of networking fundamentals, including routing, switching, security, and automation.)

The certification was paid for by my university, but the courses were free. You can search on Google for free CCNA courses, and the official Cisco website (https://www.cisco.com/) also provides learning resources. They even teach you using Cisco Packet Tracer, a free network simulator for hands-on practice. It allows you to simulate any type of network

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you can also see this tutorial https://www.geeksforgeeks.org/implementation-of-ring-topology-in-cisco/