(GNS3 is an excellent network virtual software with graphical interface that can run on multiple platforms (including windows, Linux, andmacos, etc.). Cisco network device administrators or those who want to pass the Cisco certification examinations such as CCNA, CCNP, CCIE, etc. can complete the relevant experimental simulation operations through it. At the same time, it can also be used for virtual experience of Cisco Internet operating system IOS or to verify the relevant configurations to be deployed and implemented on real routers. In short, it is a graphic front end of Dynamips, which is easier to use and more operable than using virtual software such as Dynamips directly. GNS3 integrates the following software: Dynamips: a simulator that allows users to directly run Cisco Systems (IOS). Dynamigen: is the text display front end of Dynamips PEMU: PIX Firewall device simulator. WinPcap: a free and public network access system under Windows platform. The purpose of developing WinPcap is to provide Win32 applications with the ability to access the bottom of the network.? Vpcs<imgsrc= "static/image/smiley/default/tongue.gif" smilieid= "7" border= "0" alt= "" / >c simulator.
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