CIDR /12 addressing

What is the diffrence between CIDR and SUPPERNETTING anyway...?

I believe where people are getting confused is the difference between classful and classless networks. Classful follows the rules of traditional Class A, B, and C masks. Classless doesn't follow these rules and allows you to give a Class A address a mask of say 255.255.255.0 for example. Yes, you can use a Class A mask for a Class C address.

CIDR and Supernetting are terms that can be used interchangeably. The linked article on CIDR is good to get an indepth look this, as is firewall.cx's. Just go to Networking -> General -> Supernetting/CIDR.

what is the answer, finally ?

Friend, stop looking for other people to spoon feed you and find answers for you. You gotta do it for yourself and the only thing people can do is to point you in a certain direction and its upto you whether to travel the road or not.

A man need some help and answers. Now! If you can help him - help, if you can't, then stay silent. It seems like you have never been in a situation when you need answers immediatly?

A man need some help and answers. Now! If you can help him - help, if you can't, then stay silent. It seems like you have never been in a situation when you need answers immediatly?

I've posted a link so that the original poster can go to and read and do more research and find answers for himself.

Now, your post does NOT add any value to the thread and it did not stop you from being silent. Did it? How do you know that if I have been in a situation when I needed answers or not?

Mod. edit (nske): No need for inappropriate comments, I believe your point was made clear. Nevi, no need to answer this, your point was clear too. Let's stay in subject

hi guys.. i have some answers to this ... ill appereciate u guys can correct me if this is wrong....

If i understand the question correctly it was:->

is this 193.128.7.8/12 a valid range of addresses?
Mask /12 255.240.0.0 11111111111100000000000000000000
Twelve 1s in the network portion of the address
Lowest 11000001.10000000.00000111.00001000
193.128.7.8
Highest 11000001.10001111.11111111.11111111 193.143.255.255
CIDR block of 2^20=1048576 addresses (IPv4).

or maybe I cannot use /12 with 193.x.x.x (as it is class C)?
thnx

According to me its correct as it follows the rules of sepernetting which says that *block size must be restricted to the power of 2,

in this case because ur using a /12 cidr aka supernetting, changes are being made in the second octet that is .128,if we obey the rules of sepernetting 2^8=16,
128 through 143
193.0-15.0.0
193.16-31.0.0
193.32-47.0.0
|
|
|
193.128-143.0.0
i.e first and the last nework are in the same block so we can apply supernetting to it..