CCNA Day01 Session 01 - 2018

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What is a Firmware? ( Intermediate level )

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Hi Friends, Today we will learn about Firmware! ( the lesser known part of a Computer ) We only hear and see more of software and hardware/ But there is another very important part of any computer or an electronic device... This is a Firmware. To make is simple  : I would say " Firmware is a combination of hardware and software" Let dig into it, and find more details: There are a lot of devices that contain firmware, to name a few Computer peripherals, Embedded systems, consumer appliances and Computers. A very important point to note for a firmware is that it always resides on Non Volatile memory devices such as Flash memory or a ROM, also, these could never be changed in their lifetime ( major cases ) some manufactures also release updates to the Firmware to fix bugs and  some issues if reported major. These updates have to be FLASHED into the firmware. We will go into the flashing in another blog. For now, just remember flashing is the way any firmware is ...
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How to set Chrome to not save history.

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Dear Readers, Lets learn how to avoid Chrome to save history. ( I have seen many requests regarding this on various forums, hence thought of sharing an Idea to accomplish this. )   Google Chrome has recently become the Default Web browser of choice for many Mac and PC users ( including me ). It’s fast, flexible, smart, user friendly, and relatively secure Etc Etc. But it has an issue / a flaw: unlike most browsers, Chrome has no user setting to prevent or automatically clear the browser history. We can though always manually clear the history, but doing that takes a few clicks through a few menus; not ideal. Luckily, there’s a trick we can use to prevent browsing history from being recorded in Chrome. See below for the trick. Chrome stores the browser history in a file on your computer’s drive. If we limit Chrome’s ability to modify that file, it won’t be able to record any web addresses. To start, first go into Chrome and manually clear your history by pressin...
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What is Windows Registry? ( Basic level )

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Dear friends, Today we will learn about the Windows registry. I would define Registry as a Database ( A database that stores all the low level settings information about the Operating system / Drivers / Hardware / Services and Security in a Computer. ) Lets keep it this simple!  Each of the trees under Computer is a key. ( see below image )   The HKEY_LOCAL_MACHINE key has the following subkeys: HARDWARE, SAM, SECURITY, SOFTWARE, and SYSTEM.  Each of these keys in turn has subkeys. For example, the HARDWARE key has the subkeys DESCRIPTION, DEVICEMAP, and RESOURCEMAP; the DEVICEMAP key has several subkeys and follows on. Now, lets learn in details about the Hives / keys and Sub keys   It is very important that we know, What is the significance and importance of these, that we will learn now.  For now just keep it very clear... Registry is a Database ( and ) assume these folders are different tables in a Database. With this clarity in mind, let...
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What's Inside the Computer. ( Basics ) Class 2.

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Hello Friends, Welcome to the Second Blog as promised! What's Inside the Computer! Now that we know, what a Computer is. Lets dive in to find few more facts and insights of what is happening in a Computer. I will be concentrating more on the CPU part here. As the Other parts are pretty much easy and self explanatory,  01. Keyboard/mouse - This is our Hand/Tongue ( this is the way, how we request a task from the computer ) 02. Monitor - This is where our request is shown of what has been requested. ALSO : the results are displayed here. All the processing is happening inside the CPU that we will discuss here. The CPU: Central Processing Unit The CPU is the heart and brain of a computer. It receives data input/ executes instructions/ and processes the information and then displays the result on the output screen. The CPU contains at least one processor for it to work, which is the actual chip inside the CPU that performs calculations. For long time, most CPU's o...
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