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Will You Add? - Cisco Certification: The OSI Model Isn't Just For Exams Anymore!
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... and then I break out the OSI model chart. Chins slump. People sigh, or at least wish they hadn't ordered decaf that morning.
Okay, it's not that bad. But it does temper the excitement a little. I always get a sense of "why can't we just hurry up and get on the routers and switches? Why do we have to learn this dry stuff?"
One reason is that Cisco demands you know the OSI model inside and out for both the Intro and ICND exams. You have to admit that's a pretty good reason, but still, students find the OSI model information to be very dry. I understand that, because I've been there. My first exposure to the OSI model was actually in a Novell "Networking Technologies" class, and man, w
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... and then I break out the OSI model chart. Chins slump. People sigh, or at least wish they hadn't ordered decaf that morning.
Okay, it's not that bad. But it does temper the excitement a little. I always get a sense of "why can't we just hurry up and get on the routers and switches? Why do we have to learn this dry stuff?"
One reason is that Cisco demands you know the OSI model inside and out for both the Intro and ICND exams. You have to admit that's a pretty good reason, but still, students find the OSI model information to be very dry. I understand that, because I've been there. My first exposure to the OSI model was actually in a Novell "Networking Technologies" class, and man,
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Okay, it's not that bad. But it does temper the excitement a little. I always get a sense of "why can't we just hurry up and get on the routers and switches? Why do we have to learn this dry stuff?"
One reason is that Cisco demands you know the OSI model inside and out for both the Intro and ICND exams. You have to admit that's a pretty good reason, but still, students find the OSI model information to be very dry. I understand that, because I've been there. My first exposure to the OSI model was actually in a Novell "Networking Technologies" class, and man,
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One reason is that Cisco demands you know the OSI model inside and out for both the Intro and ICND exams. You have to admit that's a pretty good reason, but still, students find the OSI model information to be very dry. I understand that, because I've been there. My first exposure to the OSI model was actually in a Novell "Networking Technologies" class, and man,
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So I dutifully attempted to memorize this massive chart. I managed to pass the exam, but I wondered what all that effort had really been for. It's not like you sit around in a server room or wiring closet and discuss the OSI model.
As a CCNA candidate, you don't have to worry about all the protocols I memorized way back when, but you do have to know what happens at each layer. Which leads to this question:
"If I work with routers and switches, why do I have to know about all the other layers? Don't routers and switches just work at layer 2 and 3?" Yes, switches work at
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