Fundamentals of Computer Networks Prof. Ravindra
Author : ellena-manuel | Published Date : 2025-05-29
Description: Fundamentals of Computer Networks Prof Ravindra Joshi Dept of Engineering Sciences International Institute of Information Technology I²IT wwwisquareiteduin 2 Fundamentals of Computer Networks What is a Computer Network It is a
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Transcript:Fundamentals of Computer Networks Prof. Ravindra:
Fundamentals of Computer Networks Prof. Ravindra Joshi Dept. of Engineering Sciences International Institute of Information Technology, I²IT www.isquareit.edu.in 2 Fundamentals of Computer Networks What is a Computer Network ?? It is a interconnected collection of autonomous devices (or nodes) for the purpose of resource sharing. Node: Any addressable device that can recognize, process or forward data transmissions. E.g. computer, server, workstation, printer etc. Autonomous: each device is independent of the other does not have master/slave relation Interconnected: connected by communication links (or transmission medium) International Institute of Information Technology, I²IT, P-14, Rajiv Gandhi Infotech Park, Hinjawadi Phase 1, Pune - 411 057 Phone - +91 20 22933441/2/3 | Website - www.isquareit.edu.in | Email - info@isquareit.edu.in 3 Concept of Layering In order to simplify understanding and reduce design complexity, a network is conceptually visualized as a stack of various layers. Various network models are available using this type of layered architecture such as, Internet model OSI reference model TCP/IP model etc. Number of layers, names of layers, functions of layers may differ for different network models Modularity: Functions of each layer are distinct and layers are independent of the others, allows for scalability (or future expansion) International Institute of Information Technology, I²IT, P-14, Rajiv Gandhi Infotech Park, Hinjawadi Phase 1, Pune - 411 057 Phone - +91 20 22933441/2/3 | Website - www.isquareit.edu.in | Email - info@isquareit.edu.in 4 OSI model for computer communication Open System Interconnection (OSI) model was invented by International Standards Organization (ISO) Open system is a model that, allows two different systems to communicate regardless of their fundamental architecture establishes communication between different systems without requiring changes in the logic of basic hardware or software OSI is a reference model (not a protocol) Each layer uses and builds on the services provided by those below it OSI reference model consists of 7-layers Functions and services provided by each layer are clearly defined International Institute of Information Technology, I²IT, P-14, Rajiv Gandhi Infotech Park, Hinjawadi Phase 1, Pune - 411 057 Phone - +91 20 22933441/2/3 | Website - www.isquareit.edu.in | Email - info@isquareit.edu.in 5 OSI model for computer communication International Institute of Information Technology, I²IT, P-14, Rajiv Gandhi Infotech Park, Hinjawadi Phase 1, Pune - 411 057 Phone - +91 20 22933441/2/3 | Website - www.isquareit.edu.in | Email - info@isquareit.edu.in 6 TCP/IP is a dominant commercial protocol architecture Since 1990 it became popular Is a result of research
