Use VPCS with GNS3

Posted on May 16, 2012 by InviAlgo

GNS3 is Graphical Network Simulator while VPCS is Virtual PC Simulator. VPCS or Virtual PC Simulator is included in GNS3 all in one installer. It is one of the best way to add computer in GNS3 topology because it can save your memory and CPU usage. However VPCS function is quite limited to ping and trace route. So if you only need to ping or trace route to simulate your network, then using VPCS will be very useful. This post will guide you step by step on how to use VPCS in GNS3 and simulate the network. This tutorial will include all necessary pictures in order to make it easier for you to understand. Continue reading →

Matlab – Thresholding an Image

Posted on May 15, 2012 by InviAlgo

This post about matlab command used in image processing for thresholding an image. Threshold is simple concept of setting range of certain value to be a value. The basic purpose of thresholding in image processing is to adjust the pixel value of an image to certain value. Lets take an example. The matlab command below can be used to thresholding an image. What this command will do is to set the pixel value to 0 if the original pixel value is below or equal to 128. Otherwise, if the original pixel value is above 128, the new pixel value will be 255. Below is the example command. Continue reading →

Netrider Training – Troubleshoot OSPF

Posted on May 8, 2012 by InviAlgo

This post is about solving or troubleshooting OSPF network. OSPF stand for Open Shortest Path First. It is an adaptive routing protocol for IP network. It uses link state algorithm and operating within a single autonomous system (AS). This question i received for netrider training. So in this post, i’ll share the question and discuss how to solve this question. Continue reading →

phpBB Change Site Logo

Posted on May 5, 2012 by InviAlgo

In phpBB by default it will use phpBB logo as your website logo at the top left corner of your page. You will be able to change the logo, file type of the image logo as well the size of the logo according to your own interest. Changing the phpBB site logo is simple enough. In this example, i will use one of styles installed in the phpBB which are subsilver2. Below is the step that you need to follow. Continue reading →

Matlab – Dilation and Erosion

Posted on April 20, 2012 by InviAlgo

In digital image processing, you must understand on dilation and erosion. Dilation adds pixels to the boundaries of objects in an image. On the other hand erosion removes pixels on object boundaries. The number of pixels added or removed from the objects in an
image depends on the size and shape of the structuring element used to process the image. In the morphological dilation and erosion operations, the state of any given pixel in the output image is determined by applying a rule to the corresponding pixel and its neighbors in the input image. The rule used to process the pixels defines the operation
as a dilation or an erosion. Continue reading →

phpBB Hide Statistic, Online User and Birthday

Posted on April 16, 2012 by InviAlgo

This post will describe how to hide statistic, online user and birthday on your forum board. In phpBB 3.0.10, actually there is setting to hide online user and birthday from your Admission Control Panel but not the Statistic. But in any cases you not be able to find where is the setting located to hide birthday and online user or how to hide statistic from the board, below i’ll explain all of them step by step. Continue reading →

Answer CCNA Security Chapter 2 Test – CCNAS v1.1

Posted on April 15, 2012 by InviAlgo

In this post, i share the questions and answer for CCNA Security Chapter 2 Test. This CCNA Security Chapter 2 test is using CCNAS v1.1. I took this CCNAS Chapter 2 Test on April 2012. Several new questions were included. So i share the new questions and answer for your references. Continue reading →

phpBB Change SMTP Server Setting to Gmail

Posted on April 14, 2012 by InviAlgo

This post is about how to change email smtp server setting to Gmail or Google. What is the purpose of change smtp server setting to Gmail? Firstly you must understand what will happen once you use Google or gmail SMTP server setting. In the email send to user such as when you use user account activation via email, instead of using your hosting server, it will use Gmail or Google server. So, when the user receive automatic email from your forum, the sender email address will be from a Google email you have setup like a normal email instead of via your hosting server. Continue reading →

Matlab – imadjust, histeq, adapthisteq and Image Histogram

Posted on April 12, 2012 by InviAlgo

This post will describe the use of imadjust, histeq and adapthisteq in image processing. Basically these three matlab command will give different results in adjusting image based on their method of adjusting an image. Imadjust to adjust the intensity values or colormap. Histeq to enhance contrast using histogram equalization while adapthisteq to contrast-limited adaptive histogram equalization (CLAHE). From all these three command, you can see the different of result image or their output between them when you execute the command. You can see how different type of image adjustment will give different result of an image. Continue reading →

Network Security Chapter 3 Packet Tracer Activity Answer

Posted on April 11, 2012 by InviAlgo

This post is solution or answer Packet Tracer Activity Chapter 3 Network Security. The title for this packet tracer activity is Configure AAA Authentication on Cisco Routers. As the title stated, this packet tracer activity regarding configuration AAA Authentication. You will learn how to configure AAA authentication using local or server based TACACS+ and RADIUS. I will guide step by step to get 100% for this packet tracer activity. At the same time, you can learn steps necessary to configure AAA authentication for Cisco routers. Continue reading →