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Network layer is used when data is to be delivered across network. So, for delivering within a network, there is no need for network layer (Ref: Pg-49, Computer Networks, Forouzan, 2 Edition). So in that case will Transport layer directly communicate with Data Link layer ? Or will Network layer be in picture, but do nothing other than simply passing data to Transport layer ?
asked in Computer Networks by Active (5.1k points) | 121 views
You meant in a LAN?
yes I meant that

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ACTUALLY without network layer we cant say that destination is present in our won network or in some other network so..

when message reach network layer first of all it is checked by using default subnet mask of host...hence if destination is present in same network then it is directly sent to destination otherwise sent to default gateway.
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