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CCNA Exam: RIPv1 vs RIPv2

Hi,

1) This is related to the CCNA Exam,
2) This is the problem discussed in one of the prep test (Please see the attached files)
3) The question: "Please study the attachment, what is the most likely reason for the disparity between the actual network numbers at the branches and the routes in the routing table on R1 router?"
4) The given answer: R2 is configured to only send RIPv1 updates
5) My question: If you think the given answer is correct, would you explain it please; or if it is not correct, what is the correct one and also give the explanation of your answer please
6) Thank you

Tjie
RIPv1002.jpg
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tjie
Asked:
tjie
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1 Solution
 
Sniper98GCommented:
Answer is correct.

RIP 1 is classfull. It does not include a subnet mask in its updates. There for; it cannot make use of VLSM. All of the networks that it advertises will use the default subnet mask for their class of network. In the case of 208.149.23.0 witch is a class C network the subnet mask will be 255.255.255.0.

RIP 2 is classless and sends the subnet mask with the update so it can use any mask.
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tjieAuthor Commented:
What is VLSM?
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Sniper98GCommented:
Variable length subnet masking.

It is what allows you to route subnets of different size instead of just using default subnet masks for each class of network.
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