I have a networking situation where some tools can or can't communicate between two devices on the same LAN but differing subnet masks (it's an error, will be corrected). The question is why do some ...

You don't need a router. If you set the subnet mask on all of the PCs to be 255.255.0.0, then they should all be able to ping each other. Basically, opening up the subnet mask puts all of the PCs on ...

Are two routers enough for practicing CCNA skills in your home lab? Maybe, maybe not. But you can practice a surprising number of CCNA-level router tasks with a two-router lab using the topology ...