I have gotten fairly deep into the CCNA lessons on this website, and am still feeling uncomfortable with some of the basics of networking.
Would you be able to go into more detail on the following?
- On a layer 2 switch, the ports / interfaces do not have IP addresses, but on a layer 3 switch sometimes they do. Why would we configure these, and would they be on the same subnet?
- On a home router, I understand that one interface would be the “default gateway”, and would be assigned the IP address that a host device would contact, to reach the router. There would also be another port with a different IP address, that’s given by the Internet Service Provider, to reach the internet.
For a router for a business though, such as a rack-mounted one, what types of interfaces can we expect to see? (Serial, ethernet, etc.) Would each of these interfaces have its own IP address? Would they be put on different subnets? Why would we assign one address versus another?
If there was a diagram I could look at with IP addresses, and why they were assigned the way they were, based on subnets, etc., that would be extremely helpful. (I’m a visual learner)