I had a doubt in routing. Everyone says that when a particular router receives a frame, it strips off the Layer 2 Header & Trailer i.e it decapsulates Layer 3 (IP) information, analyses it, or processes it, and then makes a new Layer 2 header. Now the new layer 2 Header should probably have the Mac Address of the next router which is in the way that will receive the frame. And, this process shall go on unless the frame reaches that router in whose LAN that particular Host/Server is present. Kindly correct me if I'm wrong till here.
Now I have 2 doubts actually:
1) What does that router actually analyze/process on the IP information when it strips off the Layer 2 header and trailer? How does that IP information help that router in routing? How does the router know that the next router that it'll send the frame is the right router to send? Does IP information help in all of that?
2) How does the router know the Mac Address of the next router in the line that it'll forward the frame to? Do they use ARP requests for that?
Also, am I digging too deep in contrast to what information I should technically have while preparing for CompTIA Network + considering it an entry-level certification? Is it really necessary to know soo much? Actually, I'm quite curious all the time and I love asking questions. Sometimes I really ask silly doubts too, Sorry for that :)