Kelvin Wang wrote: » Hi, can anyone explain to me how to solve the following question? I encounter this question in the ciscopress self study book but am stuck. Your help would be much appreciated, thanks! Your company is assigned four Class C networks: 200.39.32.0/24 200.39.33.0/24 200.39.34.0/24 200.39.35.0/24 Can these network be summarized into one route advertisement? How?
instant000 wrote: » Kelvin: If you could show how you are attempting to solve the problem, we could then assist you. I thought route summarization was a CCNA topic?
wrwarwick wrote: » Route summarization is a CCNP topic, not CCNA. It is helpful to know, and is something that you should know moving forward in the networking field. Don't worry about knowing it 100% for the CCNA.
instant000 wrote: » Yes, use a /22 mask. Edit: I'm sorry. Well, you need to summarize 4 contiguous networks. So, you need a mask that gives you a block size of 4.0 (or, at least, that's my initial hypothesis) First, you check if that first number is a multiple of 4.0 or not. if not, then you'd have to go up to 8.0. Since it is a multiple of 4, then you know you can use the mask of 255.255.252.0. the network is [URL="tel:200.39.32.0"]200.39.32.0[/URL] broadcast is [URL="tel:200.39.35.255"]200.39.35.255[/URL] first valid host is [URL="tel:200.39.32.1"]200.39.32.1[/URL] last valid host is 200.39.35.254
