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+6 votes
575 views
True or false -

1. In Ipv4 fragmentation can be done both at Source and intermediate routers.

2. In Ipv6 fragmentation can be done only at Source and not intermediate routers.

3. In both IPv6/4 reassembly is done only at the destination.

4. Ipv6 is connection-less or connection-oriented?

I am consfused with the following -

Is fragmentation done at the Source in Ipv4? Should the 1) be false since segmentation is done and hence fragmentation can be avoided?
asked in Computer Networks by Active (3.3k points)
edited by | 575 views
0
1) True

2) True

3) True

4)Can be both CO and CL.
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3 is wrong because in transparent fragmentation source and destination doesn''t even know about fragmentation 3 is true only in case of non transparent fragmentation or if we are talking abot ipv6 only
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Please provide what is the theory behind point 2.

1 Answer

+2 votes
All above 3 statement are correct and answer of 4 stament is IPV6 can provide both services connection oriented and connection less
answered by Junior (841 points)
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IPv4 provides a connectionless service; IPv6 normally provides a connectionless service, but it can provide a connectionoriented service if flow label field is used.

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In both IPv6/4 reassembly is done only at the destination.

Can anyone provide a Reliable source or reference for this ??
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Reassembly is done at receiver only because we want to free routers from any other tasks which is not related to forwarding. IPv6 don't even allow fragmentation at routers because of the same reason - to free routers of task which can be done somewhere else. So why would it allow reassembly ? Think about that.


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