Dear all, Having a slight problem fully grasping the benefits of Prefix Routing/CIDR. In the Cisco Press book I am reading it points out the 2 main benefits as being a reduction in routing table entries and conservation of IP addresses.
Now I understand the first one. The example they give is of a Class C assignment to a company of 200.100.48.0/21, so they are in fact being awarded 8 Class C networks but routing table entries need show only 200.100.48.0/21 when using an appropriate routing protocol pointing to this network. What I do not understand is how this conserves IP addresses. They might have a nice way of moving around the subnet mask to reduce routing table entries but surely they still have 8 Class C IP networks regardless? One of their networks would be 200.100.50.0 which is a Class C network, and they have it regardless of the subnet mask? Can someone please explain? Thanks, James. Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=56739&t=56739 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
