: The robust "Simulation Mode" allowed users to step through packet travel (PDUs) to visualize how protocols like ARP and ICMP function at each hop.
The digital wires are waiting.
Even with a simulated environment, you can gain deep insights: Packet Tracer 5.0 Cisco
However, for CCNA-level topics (subnetting, static routing, NAT, ACLs, VLANs), it was more than sufficient. Many successful CCNAs in 2009-2011 never touched a real Catalyst switch until their exam day. : The robust "Simulation Mode" allowed users to