Nnnetwork layer in internet pdf

Chapter 1 introduction to networking and the osi model. Presentation application session transport network data link physical layer 7 layer 6 layer 5 layer 4 layer 3 layer 2 layer 1. The internet protocols primary function is logical network layer addressing of. Demultiplexing was also a tcpudp feature versus application layer done by using full socket address 8 bits. Example 8 a router outside the organization receives a packet with destination address 190. Network layer internet protocol multiple choice questions. Internet layer the internet layer is in charge of addresses, d irecting capacities. Internet security association and key management protocol116.

The internet layer is responsible for packaging, addressing, and routing the data. Note that network layer addresses can also be referred to as logical addresses. The center con ventions of the internet layer are ip, arp, icmp, and igmp. All the multiple choice question and answer mcqs have been compiled from the books of data communication and networking by the well known author behrouz a forouzan. Layer 2 in the darpa model is the internet layer, which maps to the network layer of the osi model. Doing so creates a better understanding of the network data flow. Internet protocol multiple choice questions and answers mcq pdf covers the below lists of topics. Indeed, as we shall see, the protocols have been designed to operate over a large number of layer 2 protocols.

Data is transferred in the form of packets via logical network paths in an ordered format controlled by the network layer. At the physical and datalink layers, the tcpip protocols dont define any standards. A network refers to two or more connected computers that can share resources such as data, a printer, an internet connection, applications, or a combination of these resources. Input port has an associated line card nic which implements physical and datalink layer functions, as well as certain network layer functions. Decentralized switching prevents creating a processing bottleneck at a single point within the router. Application layer supports application, apps, and enduser. Layer 3 the network layer layer 3, the network layer of the osi model, provides an endtoend logical addressing system so that a packet of data can be routed across several layer 2 networks ethernet,token ring, frame relay, etc. The network layer is the third level of the open systems interconnection model osi model and the layer that provides data routing paths for network communication.