There is nothing I delight in more than teaching Cisco modern technology, especially CCNA candidates. Is it straight or online, everybody mores than happy to be there. There is expectancy in the air, and every person is ready to work hard, get the router rack and the Cisco switch that I have … and afterwards I provided an OSI design chart. Chin plunged. Individuals sigh 300-115 unloads, or at least hope they do not buy decaf that early morning.
Okay, it’s not too bad. But it’s a little upset. I always obtain a sense of “Why can not we rush and also proceed the router and also switch over? Why do we need to discover these dry points?”.
One reason is that Cisco needs you understand the OSI version in and out for the intro as well as ICND examinations. You must confess that is a pretty good reason, however still, pupils locate info on OSI designs really completely dry.
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I recognize that, because I’ve been there. My very first exposure to the actual OSI design in the Novell “Networking Technologies” class, and people, is the graph that has ever before dried. They stuff every known protocol (as well as some unknown 300-115 pdf, I believe) right into the OSI model. It resembled a gigantic jigsaw problem, and also the real problem was that I didn’t recognize what most of it was.
So I followed attempting to remember this big chart. I took care of to pass the test, however I questioned what all the initiative was. It’s not like you sit in the web server space or wire cabinet and also review the OSI model.
As a CCNA prospect, you don’t need to fret about all the methods that I remember when, but you need to understand what takes place in each layer. Which causes this inquiry:.
” If I collaborate with a router and also switch, why should I find out about all various other layers? Do not router and switch only deal with layer 2 and 3?”.
Yes, switch work with layer 2 and also router in layer 3. Yet to really understand the network, you must comprehend what is occurring in one more layer 300-115 practice examinations. Why?
Many network administrators and also engineers will invest more troubleshooting than mounting. That’s how it is. And to resolve problems effectively, you need to recognize what occurs in all layers of the OSI design, not just layer 2 and also 3.