Cisco Packet Tracer
Simulates the network behavior while providing advanced packet analysis and simulation, as well as visualization, authoring, and assessment of the network components. Support drag-and-drop functionality to easily add network devices to the organization you're developing the network or for pure learning.
Cisco Packet Tracer 8.1.1.0022 could be downloaded from the developer's website when we last checked. We cannot confirm if there is a free download of this software available. This free PC software can be installed on Windows XP/Vista/7/8/10 environment, 32 and 64-bit versions.
The actual developer of the free program is Cisco Systems. We recommend checking the downloaded files with any free antivirus. The most popular versions of the tool 7.3, 6.0 and 5.3.
PacketTracer5.exe, PacketTracer6.exe, PacketTracer4.exe, install.exe or PacketTracer5.exe.exe are the common file names to indicate this program's installer. Some of the software aliases include "Packet Tracer". The software relates to Internet & Network Tools. This free PC software can process the following extensions: ".pka", ".pkt" or ".pkz".
From the developer:
acket Tracer 5.1 is the latest version of Cisco Networking Academy’s comprehensive networking technology teaching and learning software. Innovative features of Packet Tracer 5.1, including powerful simulation, visualization, authoring, assessment, and collaboration capabilities, will help students and teachers collaborate, solve problems, and learn concepts in an engaging and dynamic social environment
You may want to check out more software, such as Cisco PacketTracer, Colasoft Packet Player or Cisco CLI Analyzer, which might be related to Cisco Packet Tracer.