Network Tools

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You can dowload the following useful tools for network administration. To download, click the icons, that will connect you to the original website of these useful softwares.

Network Simulation Programs

GNS3 is a network simulation program, that allows you to use real images. Generally it is used for Cisco devices with IOS images. But you can also add Juniper JUNOS and Alcatel-Lucent TiMOS images, and you can use this devices on your simulated network.
Packet Tracer is a network simultion program, in which there are many routers,switches and various network devices. You can make your topology and basically configure the Cisco IOS based devices. Packet Tracer is developed by Cisco Systems

Network Monitoring Tools

Cacti is an open-source, web-based network monitoring and graphing tool. With Cacti, you can monitor the live traffic and the traffic in a period of time on your network.
Nagios is an open source network monitoring software. Nagios alerts the users when a problem occurs and when it resolved.

Packet Analyze Tools

Wireshark is an open source packet analyzer. It is used for network troubleshooting and analysis. The program’s original name was Ethereal.
Tcpdump is an open source packet analyzer that runs under the command line. It allows the user to display TCP/IP and other packets being transmitted or received over a network to which the computer is attached.

Useful Tools

Putty is an open source SSH and telnet client softwara, which you can use to connect a network device.

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