Cisco CCNA Certification: The Importance Of The OSI Model
There’s absolutely nothing I appreciate even more compared to mentor Cisco modern technologies, particularly CCNA prospects. There’s a feeling of expectancy in the air, and also everybody is prepared to function hard, obtain their hands on the shelfs of Cisco routers as well as switches over I.
have available …
… and then I and also after that the OSI model chart.
I constantly obtain a feeling of “why can not we simply rush up as well as obtain on the buttons and also routers? Why do we have to discover this completely dry things?”.
One factor is that Cisco needs you recognize the OSI design in and out for both the Intro as well as ICND examinations. You need to confess that’s a respectable factor, however still, pupils locate the OSI version info to be extremely completely dry.
My initial direct exposure to the OSI version was in fact in a Novell “Networking Technologies” course, as well as male, was that graph ever before completely dry. They stuffed every well-known procedure (as well as some unidentified ones, I assume) right into the OSI design.
I dutifully tried to remember this substantial graph. I took care of to pass the test, however I questioned exactly what all that initiative had actually truly been for. It’s not like you relax in a web server space or circuitry wardrobe as well as talk about the OSI design.
As a CCNA prospect, you do not need to fret about all the procedures I remembered method back when, yet you do need to understand exactly what takes place at each layer. Which results in this inquiry:.
” If I deal with buttons and also routers, why do I need to understand about all the various other layers? Do not routers as well as changes simply operate at layer 2 as well as 3?”.
Yes, switches over working from Layer 2 and also routers at Layer 3. To genuinely recognize networking, you’ve obtained to recognize exactly what occurs at the various other layers. Why?
The majority of network managers and also designers are mosting likely to invest a great deal even more time troubleshooting compared to mounting. That’s simply the method it is. And also to fix efficiently, you’ve been familiar with just what’s taking place whatsoever layers of the OSI version, not simply layers 2 as well as 3.
As a person that’s done a great deal of employing as well as carried out a fantastic numerous task meetings, I could inform you that the capacity to repair is the primary top quality I seek. That’s why I inform CCNA and also CCNP prospects that they’ve reached obtain all the hands-on method they could while I comprehend the relevance of concept, the only means to create fixing capability is to deal with the actual offer. No simulator program.
is mosting likely to show you the best ways to fix.
In addition, the only means to really establish your troubleshooting capabilities is to recognize just what’s taking place over the whole network, not simply the buttons as well as routers. Repairing constantly begins at Layer 1 if you do not discover an issue at the Physical layer, as well as whatever’s penalty with your buttons as well as routers, just how are you mosting likely to proceed fixing if you aren’t sure exactly what the following actions are as information actions closer throughout customer?
When it comes to the OSI version, do not simply offer it a fast checkup as well as relocate on to the enjoyable things in your CCNA researches. The substantial advantage of passing your examinations is fantastic, yet it’s the concealed advantage of establishing your very own troubleshooting method that makes understanding the OSI design rewarding.
There’s a feeling of expectancy in the air, as well as every person is prepared to function hard, obtain their hands on the shelfs of Cisco routers and also changes I.
have available …
… and then I and also after that the OSI model chart. My initial direct exposure to the OSI design was really in a Novell “Networking Technologies” course, and also male, was that graph ever before completely dry. They stuffed every recognized procedure (as well as some unidentified ones, I believe) right into the OSI version. It’s not like you rest about in a web server space or electrical wiring wardrobe and also talk about the OSI design.
And also to fix properly, you’ve obtained to recognize exactly what’s going on at all layers of the OSI version, not simply layers 2 and also 3.