Routing and subnetting

I am having trouble understanding subnetting in routing.
Now I have the exam, and I can't figure out which subnet is causing trouble in a network, and how to change the network ID and subnetmask to make it work.

Anyone that can help?
I'd appreciate it.

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goldenlight

The easiest way to understand subnetting is to google the "magic Number" Danscourses.com has some free youtube videos available.

As far as routing goes I just write out the range and see if it fits.

dragonfly80

goldenlight wrote: »

The easiest way to understand subnetting is to google the "magic Number" Danscourses.com has some free youtube videos available.

As far as routing goes I just write out the range and see if it fits.

I'm watching Danscourses right now actually. But I'll try your tip. Thanx!

dragonfly80

Nah, hard to understand. I have a drawing, maybe someone can help explain a little what is wrong here?

Capture.PNG

Coolhandluke

All looks fine with the exception of the bottom subnet.

192.168.1.64 - 192.168.1.127
192.168.1.128 - 192.168.1.191
192.168.1.160 - 192.168.1.175
192.168.1.208 - 192.168.1.223
192.168.1.244 - 192.168.1.245
192.168.1.248 - 192.168.1.249

This is where the overlap occurs. This is were packets will fail/loop depending on the routing protocol in use.