(It can completely simulate all the experiments of CCNP and CCSP. Of course, the Chinese version of the GNS3 manual is different from the Packet.Tracer simulator. GNS can completely simulate all CCNP experiments, while Packet.Tracer can only simulate all the experiments of CCNA. Some CCNP commands cannot be typed in Packet.Tracer. To use the GNS simulation experiment, you must have the iOS file of the router model in the GNS. If you have the iOS file, it will not work without GNS3. So this is a must-have software . This software uses it for all the experiments that I realized when I was learning Cisco!)
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