Classless delegation supports what type of networks

Similar condition are applied for all classes. Let i have an IP address However if you were assigned If you wanted to you could use up the entire Class B private address range and assign What if some how you were assigned the entire ipv4 address space, which is 0. Classless means exactly what it says: Classless AKA of no class. You can subnet anywhere and everywhere as long as the ip scheme you choose is longer or of equal length if you want just one network than the prefix you were assigned.

The above is assuming there aren't private address or any other reserved addresses, here's a chart from wikipedia:. You are getting to the area where my confusion starts. In researching this issue, I found examples were a given. An example, you could use I just couldn't find any. They may just be keeping information from you at this point so you only learn what you need to learn. Using Classless, or Classless Interdomain Routing CIDR you can use any length you want as long as the prefix length isn't shorter than the network that was assigned to you or your company.

Back to the private address example, the range of class B private addresses is However using classless you could conceivably create one large network: This is a class C private network, however the actual range of class C private networks is Let's use this private address range to create two large networks: That's a class A network, however these days we use classless and that's the network they have assigned your company based on your needs.

Why is this the rule? Well imagine that you are using a classful routing protocol and you are using However you forget you are using classful and try to chop up the entire range into 3 subnets. So if you were a host off of the R1 network and you tried to ping Josh is probably right about your material. Subnetting has a history and makes more sense when you see how it evolved. But is had to be fixed-length subnet masking FLSM same mask size for all your networks.

It wouldnt route globally and your provider wouldnt know your subnets, but you could have say, Whether you are using SLSM or VLSM, you must configure all the subnets of the classful network on the same router, as the router will advertise the classful network, basically summarizing your subnets, even though it's not a summary. VL SM is what we do to chop up our networks focus is on SM and CID R is more of a focus on the routing aspect for providers and how they make smaller routing tables using vlsm of course.

In Subnetting we borrow subnet bits from host portion of the IP address and where as in Supernetting we borrow bits from Network portion of the IP address. Suppernetting is the way to summerize continues IP networks in a single IP network. And smaller one in case of Supernetting. Joshua, Yes you can use it but only in case of Supernetting not in subnetting.

I also explain it in my second post. Quite a lot of information to absorb. I think I am beginning to see where I am having trouble understanding. As you say Joshua, I can reduce the length of the network bits used, and I am saying 'network bits' in the classful sense, but only if the router is set up to use classless networks.

Now, thinking about a LAN, if I want to use. So now I have another question. I don't see where a 'prefix length'. I just realized that you may have answered my question. You said in one of your posts Post number 8 :. So, according to your post, I can't use just any prefix; I am constrained by the length of the network prefix I am assigned.

I can go along with this. But, now if this is so, this means that there is a little bit of classful addressing even when. Break the shackles of such terms, waseem! A super net is nothing more than a summary or aggregate. The thing is though from the perspective of your ISP or the internet Its all about the prefix that's assigned to you, what you do with it is your business. Your company is the only entity that may see it as a supernet yet the rest of the world sees it as a prefix.

Let me ask you a question, Waseem. No, however it contains many smaller networks doesn't it? Maybe it does, maybe it doesn't, but the fact remains that it has the potential to. It's all a matter of perspective my friend, but what's always true is that a prefix is always a prefix.

This goes back to the second rule above: the upstream provider technically controls the complete class of addresses out of which the downstream subnet receives its address space. I found myself in this position years ago while working for a small web-based startup. What follows is a brief summary with examples of how we went about establishing our name servers as the authorities for reverse DNS in our zone. Our assigned subnet was Thus, our network address was We begin by creating a standard zone file example-hosts for the example.

Simply add this entry to your named. Next, we define the reverse lookup mappings for the Now, for this file, we add a slightly different entry to named. We must act as the slave and participate in zone transfers.