I apologize for the stupid question; I'm trying to wrap my head around the basics of networking. Also, please feel free to direct me to the right SE forum, if this is not the right place.
My question is:
Are modems (the devices that map between digital and analog data) needed to connect routers (the devices at the networking level that implement some routing algorithm to move packets around)?
My initial thought is: assuming links are not digital (so, say, some kind of copper wire), communicating routers must either:
- be able to translate waves to bits to read the appropriate headers for addressing, or
- use some kind of a device (a modem?) to do the translation for them.
I would appreciate any insight into the role of modems in routing. As a source I have Kurose & Ross, 6th edition, so a simple pointer to a relevant section of the book could also help me a lot.