GNS3 is a Graphical Network Simulator that allows emulation of complex networks. You may be familiar with VMWare, VirtualBox or Virtual PC that are used to emulate various operating systems in a virtual environment. These programs allow you to run operating systems such as Windows XP Professional or Ubuntu Linux in a virtual environment on your computer. GNS3 allows the same type of emulation using Cisco Internetwork Operating Systems. It allows you to run a Cisco IOS in a virtual environment on your computer. Dynamips is the core program that allows IOS emulation. GNS3 runs on top of Dynamips to …

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![IMG_13002](/attachments/small/3/IMG_13002.jpg "align-right") The D-link DCS-2230 offers a low cost solution to indoor surveillance. Boasting 2-way communication, wireless N connectivity, and 1080p resolution even in complete darkness. Opening the box provided the basics: The camera, power, documentation, mounting hardware, CAT5 cable, and installation software. After plugging the camera into my router and powering it on, I proceeded to install the software. Inserting the CD greeted me with the familiar D-Link installation screen. There are two programs that need to be installed: The Setup Wizard SE and the D-ViewCam surveillance software. ![SE_Software](/attachments/small/3/SE_Software.jpg "align-left") The Setup Wizard found the camera in seconds and …

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Wireless is, without doubt, a really great thing. Apart from when it doesn't work that is. If you live in a big old house, for example, then getting your WiFi signal to extend through a few thick walls from one end of the place to the other is not always easy. And before you utter the magic words 'repeater hub' I throw back the 'not always easy' incantation in your direction. I know all about the fun you can have with a less than optimal wireless signal, especially if you throw a few kids and an Xbox into the equation: …

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The End.