Demo

Summary

- The network layer is responsible for routing a packet within the subnet i.e from source to destination across various nodes in the same network or across the internet. - This layer ensures that successful delivery of the packet to destination and to perform this, network layer has to choose routes. - This layer is also responsible for tackling the congestion problem i.e when there are too many packets & stores at a node and forwarded to the next node. - This layer also has to carry accounting function. The header of network layer contains the necessary information needed to facilitate the billing. - It also contains the logical address and destination address. To summarize the functions: 1. Routing: It chooses route for the network data. 2. Congestion control: It takes care of the congestion i.e no. of packets stored at a node to be forwarded. 3. Source and destination addresses.