Monday, June 25, 2007

Subnet masks (oh what a joy)

This week i'm doing a Cisco CIND course. And on the first day, joy of joys i've been doing subnetting. For those who don't know this means working out the subnet masks and host address ranges for various numbers of subnets or hosts.
Its been a long time since I did any of this and it's no easer than the last time I did it. Why is it less complex to work it out using binary than doing it the easy way using decimals? I think I might just be scared of numbers bigger than 1!

Even though getting my head round some of the maths is tricky, I still think ill get a lot out of the course (most of the Microsoft ones I've done tend to be a bit lacking in practical information), but why is one of the first things the tutors ask is 'are you taking the exam?' Are they all on commission from the vendors? I've never seen the point in taking an exam that will be irrelevant or not recognised by anyone within a couple of years. I suppose it looks good on a cv, but I don't think it makes up for real world knowledge.

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