Subnet the Address Space?

Question

You have been given the 192.168.1.0/24 address space to use in your network design. The network consists of the following segments:
• The network connected to router R1 will require enough IP addresses to support 15 hosts.
• The network connected to router R2 will require enough IP addresses to support 30 hosts.
• The link between router R1 and router R2 will require IP addresses at each end of the link

So How many subnets are needed for this network?
What is the subnet mask for this network in dotted decimal format?
What is the subnet mask for the network in slash format?
How many usable hosts are there per subnet?.

Confused -_-. Can a kind hearted brainiac go through that. even better http://www.claessens.be/les/atel/pka/lab_pka_06_07_05.pdf just Task 1 will do fine

Answer 1

Hi,



Okay, let's see, a subnet mask, is just what is says it is: a mask to "isolate" networks from each other. To get more info, look at this page http://www.webopedia.com/TERM/S/subnet_mask.html



I see three networks here, R1, R2 and the link between R1 and R2, I'd go for the three subnet masks. Since you only have 25 addresses, and the routers isolate these, - minus the one needed to link the two, I'd guess you can only have 24 hosts at a time...

Since both routers isolate the networks...

Read this page too, I think you can shed some light on the questions from that info:

http://searchnetworking.techtarget.com/generic/0,295582,sid7_gci1247833,00.html#subnet_mask



PS : going for certification? Dont let that get to you...zen out sometimes...



Best of luck. And I hope it helps you pass...



Thor

Answer 2

First... to help you out with converting /format to decimal format and vice versa....there are 32 bits in an entire subnet mask, and it is broken up in 4 (x.x.x.x) octect bit segments.....the bits are in this format 1 2 4 8 16 32 64 128. Each number represents one bit. If you had all 8 bits used, you add up all the numbers and it equals 255.



So if you are using a subnet mask of 255.255.255.0, that equals 8+8+8 = 24 or /24. Because to achieve 255 you are using all the bits in an the first octect, all the bits in the second, etc. Furter, If your subnet mask is 255.255.255.128, you borrowed a bit from the last octect so you are now /25.



Subnetting is a whole other post man and alot to type out. but essentially the subnet mask identifies the network, the subnet (if any) and the host ID's......



You also need to learn about the classes of networks A, B, C class networks...



The quick answer to your question is you would need 3 subnets....the link between the routers can be on the same subnet.....although they dont have to be.....but subnetting your ip scheme would look like this...



Subnet Mask Subnet Size Host Range Broadcast

192.168.1.0 255.255.255.192 62 192.168.1.1 to 192.168.1.62 192.168.1.63

192.168.1.64 255.255.255.192 62 192.168.1.65 to 192.168.1.126 192.168.1.127

192.168.1.128 255.255.255.192 62 192.168.1.129 to 192.168.1.190 192.168.1.191

192.168.1.192 255.255.255.192 62 192.168.1.193 to 192.168.1.254 192.168.1.255

Answer 3

If you are much more interested in studying to speak Spanish than study or create it (they do teach reading through and writing but speaking is far far more heavily emphasized)