When building a lab to use to practice for CCNA or CCNP, you need Cisco switches. Part of the decision must be how many switches you can afford. And of course you’ll want to know whether adding that ...

Thanks for STP. but one thing pops in my mind how does it stops a network loop in this scenario. A frame (source pc0/1, destination pc2/1) just entered my Switch(SW1) and then router(R1) then ...