Network Layer

NETWORK LAYER

TABLE OF CONTENTS
OSI layered architecture with a suitable diagram............................................................................1
Comparison of OSI reference model with the TCP/IP protocol......................................................2
Some common applications found in the TCP/IP protocol suite.....................................................2
One other network model which exist besides the OSI model and TCP/IP Protocol suite.............2
Analyse wired and wireless mediums with suitable examples in terms of cost, speed,
expandability & distance, environment, and security......................................................................3
REREFENCES................................................................................................................................5

OSI layered architecture with a suitable diagram
OSI or open system interconnection model is a kind of model that helps in explaining
functions of networking system. It helps in maintaining communication within different
computer systems. It has seven different abstraction layer: physical, data link, network, transport,
session, presentation and application layer. Each of these layers has its own functions that has
been explained below:
Physical layer: Main function of this layer is to sent or transmits raw and unstructured data bits
from physical layer of sending device to Physical layer of receiving device (Sinha and et. al.,
2017).
Data link layer: At this layer node to node data is transferred where data is packed into frames.
Any kind of error that has occurred at physical layer is also corrected at this layer.
Network layer: It is mainly responsible for receiving frames from previous layer and deliver
them to their intended destination. On the basis of address contained within the frames.
Transport layer: Main function of this layer is to manage delivery and error checking of data
frames.
Session layer: It majorly controls conversation between different systems.
Presentation layer: It translates data for application layer on the basis of syntax that are accepted
by application.
Application layer: At this layer both user and layer interacts with end software application.
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