Switch model selection flowchart.
tools tutorial ciscoGNS3 is a graphical network simulator that allows simulation of complex networks. GNS3 is an excellent complementary tool to real labs for network engineers, administrators and people wanting to study for certifications such as Cisco CCNA, CCNP, CCIP and CCIE as well as Juniper JNCIA, JNCIS and JNCIE.
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