I am learning CCNA and was using packet tracer to experiment stuff.
Is there any way where i can get the sample network scenario so that i can try to emulate in packet tracer uisng all ACL, VLAN OSPF , NAT
i want to simulate ISP , WAN link , etc
GNS3 is a popular Graphical Network Simulator. I highly recommend their quick start guide. You might want to take a look at their forum, where you can download complete labs etc.