how can i ping vlan 10 and 20 to vlan 30 and 40? in which i use 2 switch n 2 router to create WAN and VLAN? when i define vlans on switch and the i go to the router so here i can't give ip address here i attach my topology picture. please help me out...

please tell me about ips means that what is network ip? default ip? and etc.. with exampleThank you so much

can some one please help me to teach WAN, Routing and Switching configuration?

2pc are connected with layer2 and layer2 connected with layer3. now another Router(wan) is connected with layer3. Now i want that pcs and Router(wan) both are communicate and providing internet. now anther Router(isp) is connected with previous Route...