Guys,
While studying for the CCDA, I found the following question in one of the
exam preparation sites.
The following IP addresses can be summaried by which bit of the 3rd octet
172.16.0.0, 172.16.64.0, 172.16.128.0, 172.16.192.0 ---> 1st bit, first 2
bit, first 4 bit, last 6 bit
I don't think
Title: RE: CCDA summerization question
I'd have to agree with you. The best summarization possible is 172.16.0.0.
-Original Message-
From: John lay [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, September 27, 2000 12:24 AM
To: [EMAIL PROTECTED]
Subject: CCDA summerization que
It would be the first 2 bits in the 3rd octet. Go back to subnetting these
are network numbers with the netmask of 255.255.192.0 First 2 bits make
192. 256-192 = 64.
64, 128, 192
Scott P.
"John lay" <[EMAIL PROTECTED]> wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> Guys,
>
> W
i think it should be the first 2 bits.notice that "to be summaried".we know
the summaried address is 172.16.0.0,it use the the first 3 bits to devide
the subnet to 6 nets.due to the given situaton,the first 2 bits are
summaried.
i used to find the question in the CCDA true test and i passed it.
This is possibly one of those situations with just a poorly worded question.
Now, to nit-pick at the wording.. "The following IP *ADDRESSES*" --
Addresses, not networks, but ADDRESSES..
Now, is this VLSM summarization, in which case "no bits in the 3rd octet"
without doing 2 summaries (50% saving
You can summarize on the first bit but you would need two summary address
statements to cover all 4 networks:
172.16.0.0 mask 255.255.128.0 for the networks 172.16.0.0 and
172.16.64.0
172.16.128.0 mask 255.255.128.0 for the network 172.16.128.0 and
172.16.192.0
Regards,
No Shut
It would be the
DM)
Subject: Fwd: Re: CCDA summerization question
You can summarize on the first bit but you would need two summary address
statements to cover all 4 networks:
172.16.0.0 mask 255.255.128.0 for the networks 172.16.0.0 and 172.16.64.0
172.16.128.0 mask 255.255.128.0 for the network 172.
7 matches
Mail list logo