Homework Help with Network+ Anybody up to it?

[plucky duck]

Hey all, I'm kinda stuck on a networking question. I'm a newbie with this stuff, so no surprise eh.

Well, here's the question:

Given IP
156.25.0.0

# of subnets needed: 14
# of hosts per subnet needed: 3578

Provide the custom subnet mask.
List the first three network IDs and the range for each one.

Here's my kick at it:

Well thats a Class B IP, so the default subnet mask is 255.255.0.0

So I would have 2 octects to play around with.
Looking something like this given the network/host restrictions:

x.x.0000//0000.00000000
x.x.1111//0000.00000000

So the custom subnet mask would be:
255.255.240.0 right?

Now here's what I got for the 3 Network IDs and its ranges:

156.25.16.0
Range is (156.25.16.1 - 156.25.16.254)

156.25.32.0
Range (156.25.32.1 - 156.25.32.254)

156.25.48.0
Range (156.25.48.1 - 156.25.48.254)


Is the above correct or should the last octect for each range be 4096?? I'm confused on the part regarding the number of host ids, whether 254 is the max limit for the last octet or can I go higher? I'm dumb http://sysopt.earthweb.com/forum/frown.gif

I need to hand this in along with a bunch of other stuff tomorrow morning, so any help would be greatly appreciated http://sysopt.earthweb.com/forum/smile.gif

Plucky

[CujoRbd]

^^^bump^^^

(don't know the answer, but i know there's somebody here who does!)

[socalgal]

Moved to Networking forum. http://sysopt.earthweb.com/forum/wink.gif