help me how to subnet class A, B & C

Hi Durk21

One more question to you...
what you think : for a class B address can i use 255.255.255.240 as a subnet musk?
according to your previous post answer is no. but i guess you have the actual picture of the network.

To answer this NO you can not use it for a CLASS B

BUT CLASS C NO PROBLEM!

This is what my teachers have show me. It should also be in any good CCNA CISCO textbook.

I belive some where you missing out the concept......

you can use the subnet mask 255.255.255.240 for Class A IP address...for Example say

IP: 10.1.1.1 / 28 (255.255.255.240)

The IP setting will give you

Network Address: 10.1.1.0
Broadcast Address: 10.1.1.15
First Host IP : 10.1.1.1
Last Host IP : 10.1.1.14


So, It says any subnet mask can be used with any IP class.

I take it your referring to VLSM?

believe some where you missing out the concept......

you can use the subnet mask 255.255.255.240 for Class A IP address...for Example say

IP: 10.1.1.1 / 28 (255.255.255.240)

The IP setting will give you

Network Address: 10.1.1.0
Broadcast Address: 10.1.1.15
First Host IP : 10.1.1.1
Last Host IP : 10.1.1.14


So, It says any subnet mask can be used with any IP class.

Because i wasn't referring to the actual use of VLSM I was merely referring to the basics of subnetting as per the original topic.

Hi Durk21

One more question to you...
what you think : for a class B address can i use 255.255.255.240 as a subnet musk?
according to your previous post answer is no. but i guess you have the actual picture of the network.

To answer this NO you can not use it for a CLASS B

BUT CLASS C NO PROBLEM!

This is what my teachers have show me. It should also be in any good CCNA CISCO textbook.

I belive some where you missing out the concept......

you can use the subnet mask 255.255.255.240 for Class A IP address...for Example say

IP: 10.1.1.1 / 28 (255.255.255.240)

The IP setting will give you

Network Address: 10.1.1.0
Broadcast Address: 10.1.1.15
First Host IP : 10.1.1.1
Last Host IP : 10.1.1.14


So, It says any subnet mask can be used with any IP class.

Hehe, this was what i was just thinking on my way to work. The only explination was that we are mixing the standard Classfull subnets 255.0.0.0/255.255.0.0 & 255.255.255.0 with VLSM.

Smurf,
thanks man!! however can you discuss something about VLSM?
I don't have idea about VLSM!! from the discussion above it seems that whatever i was trying(Dove also) to say is the VLSM?(example given by Dove is example of VLSM??)

and whatever durk21 is telling is the actual picture of classful addressing?

yes thank you DOVE for pointing out what i was saying from the start I appreciate it. For those of you just reading this I was explaining Basic Subnetting not Subnetting using VLSM.

Smurf,
thanks man!! however can you discuss something about VLSM?
I don't have idea about VLSM!! from the discussion above it seems that whatever i was trying(Dove also) to say is the VLSM?(example given by Dove is example of VLSM??)

and whatever durk21 is telling is the actual picture of classful addressing?

Yes I am Using the CLASSFUL Subnetting technique in my previous posts. I AM NOT NOT subnetting using VLSM. If you want to subnet using VLSM look at Doves example.

I was posting on the original topic.