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Old 07-09-2011, 03:25 AM
bs_kwaj bs_kwaj is offline
Join Date: Nov 2007
Location: Kwaj
Posts: 325
Default Cisco IOS Versions

Just something I'm curious about...

I just bought a 3550 48-port switch and it has the following IOS loaded:


I have access to a newer(?) version:


I assume, of course, that it doesn't really matter for the CCNA studies, but I would still be interested in knowing what changed from '-44.se6' to '-46.SE'. Or, what's the difference?

If we were talking about a production environment, would this be like an upgrade or a patch or just a different version that has a couple of different features and you just simply could have purchased either one.

Does Cisco have anything 'easily useable' to compare the two?


Note: sho ver on the loaded IOS says, "Running Layer 2/3 Switching
image". Since this was sold to me as a WS-3550-48-SMI, I wasn't sure that would be the case. I'm glad it is.
I thought I was wrong once. But, of course, I was wrong.
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