Packet Tracer 5.1
About Packet Tracer
Packet Tracer is a self-paced, visual, interactive teaching and learning tool. It is designed to increase interaction between students and instructors, promote student learning, and enhance instructor presentations. This technology is a new and fun way to expand teaching and learning experiences beyond the limitations of a traditional lab environment. Packet Tracer helps resolve some common challenges that instructors face on a daily basis, while enabling us to explore new frontiers in networking education.

Product Feature Solution Fit
Packet Tracer is an enhancement of the current standalone product. It expands upon the feature set that exists. This product is meant to be used as an education product that provides exposure to the command-line interface of Cisco devices for practice and discovery learning. It also improves on the visualization components, making it easier for instructors to deliver presentations and for students to understand the inner workings and interactions of  networking equipment to perform data transfer and support communications.
Key Features
In the Simulation and Visualization Mode, students can see and control time intervals, the inner workings of data transfer, and the propagation of data across a network. This helps students understand the fundamental concepts behind network operations. A solid understanding of network fundamentals can help accelerate learning about related concepts.
The physical view of devices such as routers, switches, and hosts, presents graphical representations of  expansion cards and identifies the capabilities of each card. The physical view also provides geographic representations, including multiple cities, buildings, and wiring closets.
Note : The Real-Time Mode provides students with a viable alternative to real equipment and allows them to gain configuration practice before working with real equipment.
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SCREENSHOTS
Figure 1 Packet Tracer software in use to visualize control data flow.

Figure 2 Packet Tracer “Activity” File, view of network and instructions as they appear to the student.

Figure 3 Authoring interface, including control of an answer network to choose aspects of the student’s network to be identified and scored for feedback.

Figure 4 Feedback from a partially completed performance showing which aspects of a network have been configured correctly.

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Download:
Link1 , Link2 (This is Full Licensed Version.)