by Dinesh Thakur Category: Communication Networks

The package level or network layer is located on the third level of the hierarchy architecture reference model as shown in Figure.

  network layer

This layer exists when the network uses a packet level. The functions defined by International standardization in the framework of the reference model are:

• Setting up network connections to route packets. This function is but not an obligation in the packet level, and it is perfectly conceivable to have a connectionless. If the X.25 standard is connection mode, IP, in contrast, works in connectionless mode.

• Supports packet routing and gateways problems for reach another network.

• Multiplexing network connections.

• Supports the segmentation and clustering.

• Packet loss detection and recovery of lost packets. This function is not Mandatory packet level. IP, for example, level protocol packet has no way to recover lost packets.

• Continuation of sequence data provided to the upper layer, but is not an obligation.

• Flow Control, so there is no overflow memories in charge packet transmission.

• Transfer of explicit data (not mandatory).

• Resetting the network connection (not mandatory).

• Quality of service (not mandatory).

• Managing the network layer.

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Dinesh ThakurDinesh Thakur holds an B.SC (Computer Science), MCSE, MCDBA, CCNA, CCNP, A+, SCJP certifications. Dinesh authors the hugely popular blog. Where he writes how-to guides around Computer fundamental , computer software, Computer programming, and web apps. For any type of query or something that you think is missing, please feel free to Contact us.

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