Hi everyone. I've made up this topology and just done everything that i could to make it work. The devices within its vlan can ping each other just fine but it cannot ping across the router. My theory is that there is something wrong with the serial ...

Hi I'm pretty new to network and was wondering is it possible to enable portfast on the usable ports in this topology. If can then please show me how to do it. Thanks!

I'm trying to obtain an IP address from the dhcp server but it won't work for the PCs except for the Printers which are getting the address from DHCP server just fine. I'm not sure what's really going on here. Please help if you can it is heavily app...