There's nothing I appreciate more than showing Cisco innovations, particularly CCNA up-and-comers. Regardless of whether it's face to face or on the web, everybody's eager to be there. There's a feeling of expectation noticeable all around, and everybody is prepared to buckle down, get their hands on the racks of Cisco switches and switches I have accessible...
... and after that I break out the OSI model outline. Jaws droop. Individuals murmur, or if nothing else wish they hadn't requested decaf that morning.
Alright, it isn't so awful. Be that as it may, it tempers the fervor a bit. I generally get a feeling of "for what reason wouldn't we be able to simply hustle just a bit and jump on the switches and switches? For what reason do we need to gain proficiency with this dry stuff?"
One explanation is that Cisco requests you realize the OSI model all around for both the Introduction and ICND tests. You need to concede that is an entirely valid justification, yet at the same time, understudies see the OSI model data as dry.
I get that, since I've been there. My first presentation to the OSI model was quite a Novell "Systems administration Advances" class, and man, was that diagram ever dry. They packed each known convention (and some obscure ones, I think) into the OSI model. It resembled a mammoth jigsaw perplex, and the genuine issue is that I didn't have the foggiest idea what the hell the vast majority of that stuff was.
So I obediently endeavored to retain this enormous diagram. I figured out how to finish the test, yet I considered what all that exertion had truly been for. Dislike you lounge around in a server room or wiring wardrobe and talk about the OSI model.
As a CCNA up-and-comer, you don't need to stress over every one of the conventions I retained route back when, yet you do need to comprehend what occurs at each layer. Which prompts this inquiry:
"In the event that I work with switches and switches, for what reason do I need to think pretty much the various layers? Don't switches and switches simply work at layer 2 and 3?"
Truly, switches work at Layer 2 and switches at Layer 3. In any case, to really comprehend organizing, you must comprehend what occurs at different layers. Why?
Most system heads and architects will invest much more energy investigating than introducing. That is only the manner in which it is. What's more, to investigate adequately, you must recognize what's happening at all layers of the OSI model, not simply layers 2 and 3.
As somebody who's done a ton of procuring and led a considerable number prospective employee meet-ups, I can reveal to you that the capacity to investigate is the main quality I search for. That is the reason I tell CCNA and CCNP competitors that they must get every one of the hands-on training they can; while I comprehend the significance of hypothesis, the best way to create investigating capacity is to deal with the genuine article. No test system program is going to show you how to investigate.
Also, the best way to really build up your investigating capacities is to recognize what's happening over the whole system, not simply the switches and switches. Investigating consistently begins at Layer 1; on the off chance that you don't discover an issue at the Physical layer, and everything's fine with your switches and switches, how are you going to keep investigating in the event that you don't have the foggiest idea what the subsequent stages are as information draws nearer to the end client?
So with regards to the OSI model, don't simply give it a brisk once-finished and proceed onward to the fun stuff in your CCNA ponders. The unmistakable advantage of passing your tests is extraordinary, yet it's the shrouded advantage of building up your very own investigating technique that makes acing the OSI model beneficial.
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