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Yes, there is activity; packets do not have to be generated for the sole purpose of carrying data. Some protocols, such as DHCP, or DNS, or ARP generate informational packets and are not carrying data. It is rare for a network to not transmit packets for long periods of time.
Packets Words
tunneling
Packets
The network layer is the layer that is responsible for routing packets on the network. This is the layer in which Internet protocol operates. In the seven layer OSI model, the network layer is the third layer from the bottom.
Network
As load exceeds network capacity, packets gets jammed at nodes. These packets never go forward unless load goes below network capacity. Hence when load exceeds network capacity delay tends to infinity. As load exceeds network capacity, packets gets jammed at nodes. These packets never go forward unless load goes below network capacity. Hence when load exceeds network capacity delay tends to infinity.
Network Layer
Network Layer ( 3 )
packets
Unicast
Default gateway