I happened to read that " ip reassembly happens at the destination host and not at the intermediate routers. " The book doesnt say why nor does it talk about the reason for the reassembly of ip. Could you please let me know why is reassembly of ip done and in why only at the destination host ?
The goal of ip reassembly is to re assemble fragmented packets.
This should happen at the destination host.
If it happens on the intermediate routers, then fragmentation will have to re-occur again and this is cpu intensive and time consuming, will result in delays. Hence this is done at the destination