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Home > Archive > 70-216 > February 2002 > Mulitcasting quiz
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| unreal 2002-01-19, 5:43 am |
| You are the administrator of a large network. At the moment you are using IP 207.200.16.0/24 for muliticasting purposes. Your CEO wants to add 2000 pc's to your network, and make sure the current subnet can deal with an extra 2000 workstations. Should you:
A. 200.17.0-207.200.24.0
B. 200.33.0- 207.200.48.0
C. 200.16.0/20
D. 200.16.0/22 - 207.200.16.0/23
Most chooses C. Any idea how it works, cause I only know multi-casting ia the act of transmitting a message to a select group of recipients. | |
| FreddieFormat 2002-01-19, 5:57 am |
| I think the subnet mask is 20 ie 255.255.240.0 as leaves 12 bits spare ie 2048 hosts - could be wrong though as I haven't yet properly covered multicasting in my studies. | |
| unreal 2002-01-19, 10:08 am |
| hi Freddyformat, thanks for sharing your views.
A bit of re-reading, indeed, it's a Classless Inter-Domain Routing (CIDR) network, also described as "slash x" network. The 'x' is a number ,representing the number of bits in the IP address range that the InterNIC controls.
So in this question, the current IP's addressess(/24 or class C network) is not sufficient, because 2 to the power of 8, gives 256 hosts.
Therefore, by requesting a "200.16.0/20" CIDR network, as the 'x' is the number of bits being controlled by IANA, so 32bits minus 20 bit, remainder 12 bits, which is 2 to the power of 12, giving more addressess other then required.
So quiz seems to test on TCP/IP, not 'multicasting'. Correct me if I'm wrong. | |
| FreddieFormat 2002-01-23, 4:36 am |
| I think you're right. | |
| er234 2002-02-03, 12:58 am |
| To let you all know 207.17.0.X is not a multicast address it is a class c address. Multicast is from 224-239. | |
| chodan 2002-02-03, 1:20 am |
| ITs actually an insane question.
Fistly your starting with only a class C
You can`t supernet what you dont have.
Also nobody who knew what was what would put 2000 hosts on a subnet.
And lastly I`m not sure what multicasting has to do with this at all.
Maybe some info was left out of the question.
I hope someones instructor didn`t write this question. | |
| wbafrank 2002-02-03, 2:06 am |
|  This question is incomplete and could never be worked out!! | |
| unreal 2002-02-05, 7:52 am |
| quote:
Originally posted by wbafrank
This question is incomplete and could never be worked out!!
I guess this is the typical characteristics of questions from Dumps- Incomplete.
Excuse me.. |
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