Hello, Hope all is well with everyone.  Can someone explain a real world scenario when they used PPP with CHAP or PAP, PPoE, GRE Tunnel? -Perhaps an explanation of the setup, why it was used, etc.  Thanks in advance.

Hello All, I have a simple network of 3 switches in a triangle, and each switch as 1 PC connected.  How can I prevent STP from disabling the edge ports?  The only way I can prevent this is to plug the PC's to Switch's first and then connect the switc...