CCNA Day01 Session 01 - 2018

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The BOOT Process ( Intermediate level ) Class 4.

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Hi Friends, Now, that we are ready : We have gone through Basics of Computer/hardware and software lets now begin the interesting journey. The First STEP ( Once you press the power button ) We will see how the computer starts. After the power button is pressed, it performs 'power on self test' POST. POST checks a computer's internal hardware for compatibility and working status before starting the boot process. If the computer passes the POST, the computer may give a single beep and it starts to continue to boot. However, if the computer fails the POST, the computer will generate a beep code that tells the user the source of the problem. Any errors here can be identified by beep sounds ( as display drivers are not loaded yet and there is no display formed ) However, because of the wide variety of different computer manufacturers with this BIOS, the beep codes may vary. For a DELL motherboard below are the codes. 1 beep - BIOS ROM corruption or failure 2 bee...
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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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Computer Hardware/Software ( Basics ) Class 3.

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Hi Friends, Welcome back...In this Blog, We will go through and understand about Hardware and Software ( the two components that everything in a computer can be categorized ) Hardware and Software are both completely different to each other, but are merged into each other.There is also a Firmware in addition to it, that I will discuss in a seperate blog later. The best example to differentiate hardware and Software is below : If we consider Human body as hardware THEN Soul is a software. Though they are so immensely merged together, still the difference is huge! HARDWARE: Hardware is the actual component that our computer is made of. These are the things that we can see and touch such as a monitor, keyboard, CD Drive, CPU etc. Without the hardware a computer would not exist. 1.Physical parts of the computer are called hardware. 2.You can touch, see and feel hardware. 3.Hardware is constructed using physical materials or components. 4.If hardware is damaged, it is replaced ...
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What is a Virtual machine ( Introduction )

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Hello friends, Now that we have gone through Software/Hardware/Firmware now is the time to step ahead! Lets learn about Virtual machines. Before we get into details, lets get to understand what is a Virtual Machine.  Again, I am not giving you any text book answer, I will explain in very neutral and layman terms so that the basic is well understood and remembered. The term Virtual means, something which is not physically available. Now, when I say virtual machine, it means a computer that is not physically available.  Lets consider a small Office network: 10 users and a server. Total inventory required ( basics for PC office setup ) will be: 01. 11 monitors 02. 10 normal CPU's AND a Server CPU. Now, I plan to install a virtual network, and what I need now is: 01. 11 Monitors. 02.JUST ONE SERVER PC. We are done! The example above was only for a small scale startup with 10 pc setup, just imagine this setup for 100 and 1000 and more PC setups!  V...
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