Data communication and computer networks lecture notes pdf

Tech Students. We provide B. Each of the devices on the network can be thought of as a node; each node has a unique address.

Addresses are numeric quantities that are easy for computers to work with, but not for humans to remember. Some networks also provide names that humans can more easily remember than numbers. Share this article with your classmates and friends so that they can also follow Latest Study Materials and Notes on Engineering Subjects. For any query regarding on Computer Network Pdf Contact us via the comment box below. Leave A Reply Cancel Reply.

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Related Topics. Computer Networks Syllabus- B. Define Encapsulation and Peer to Peer communication in the layered architecture. With neat sketch Explain Packet switching technique in detail.

Give a brief explanation about copper cables with neat sketch. Describe the stop and wait for a protocol with a neat sketch. Explain the Distance Vector routing algorithm with an example.

Explain all states in it. What is the significance of the data link layer? Explain the design issues of the data link layer. Explain the different layers of ATM. Edition no. Dhotre V. Bagad Technical Publications Paperback Edition no.

Pearson Education Edition no.Data communications refers to the transmission of this digital data between two or more computers and a computer network or data network is a telecommunications network that allows computers to exchange data. The physical connection between networked computing devices is established using either cable media or wireless media. The best-known computer network is the Internet. A system of interconnected computers and computerized peripherals such as printers is called computer network.

This interconnection among computers facilitates information sharing among them. Computers may connect to each other by either wired or wireless media. Networking engineering is a complicated task, which involves software, firmware, chip level engineering, hardware, and electric pulses.

To ease network engineering, the whole networking concept is divided into multiple layers. Each layer is involved in some particular task and is independent of all other layers.

But as a whole, almost all networking tasks depend on all of these layers. Layers share data between them and they depend on each other only to take input and send output. A network of networks is called an internetwork, or simply the internet. It is the largest network in existence on this planet.

Present day, Internet is widely implemented using IPv4. Because of shortage of address spaces, it is gradually migrating from IPv4 to IPv6. Internet enables its users to share and access enormous amount of information worldwide. At huge level, internet works on Client-Server model. Internet uses very high speed backbone of fiber optics. To inter-connect various continents, fibers are laid under sea known to us as submarine communication cable.

Computer systems and peripherals are connected to form a network. They provide numerous advantages:. This tutorial has been prepared for the computer science graduates to help them understand the basic to advanced concepts related to Data Communication and Computer Networking.

After completing this tutorial you will find yourself at a moderate level of expertise in Data Communication and Computer Networking from where you can take yourself to next levels.

Before you start proceeding with this tutorial, I'm making an assumption that you are already aware about basic computer concepts like what is keyboard, mouse, monitor, input, output, primary memory and secondary memory etc. If you are not well aware of these concepts then I will suggest to go through our short tutorial on Computer Fundamentals.

Previous Page Print Page. Next Page.Resource Sharing means to make all programs, data and peripherals available to anyone on the network irrespective of the physical location of the resources and the user. Reliability means to keep the copy of a file on two or more different machines, so if one of them is unavailable due to some hardware crash or any other them its other copy can be used.

Communication Medium means one can send messages and whatever the changes at one end are done can be immediately noticed at another. The main objective of ARPANET was to develop a network that could continue to function efficiently even in the event of a nuclear attack. It is not owned by anybody. Circuit Switching : In the Circuit Switching technique, first, the complete end-to-end transmission path between the source and the destination computers is established and then the message is transmitted through the path.

The main advantage of this technique is guaranteed delivery of the message. Mostly used for voice communication. Message Switching : In the Message switching technique, no physical path is established between sender and receiver in advance. This technique follows the store and forward mechanism. Packet Switching : In this switching technique fixed size of packet can be transmitted across the network.

Transmission media: 1. Twisted pair cable : — It consists of two identical 1 mm thick copper wires insulated and twisted together. The twisted pair cables are twisted in order to reduce crosstalk and electromagnetic induction.

Co-axial Cables: It consists of a solid wire core surrounded by one or more foil or braided wire shields, each separated from the other by some kind of plastic insulator. It is mostly used in the cable wires.

Optical fiber : — An optical fiber consists of thin glass fibers that can carry information in the form of visible light.

Infrared : — The infrared light transmits data through the air and can propagate throughout a room, but will not penetrate walls. It is a secure medium of signal transmission. The infrared transmission has become common in TV remotes, automotive garage doors, wireless speakers etc.

data communication and computer networks lecture notes pdf

Radio Wave : — Radio Wave an electromagnetic wave with a wavelength between 0. The transmission making use of radio frequencies is termed as radio-wave transmission. Microwave Wave : — The Microwave transmission is a line of sight transmission. Microwave signals travel at a higher frequency than radio waves and are popularly used for transmitting data over long distances.

Satellite link : — The satellite transmission is also a kind of line of sight transmission that is used to transmit signals throughout the world. There are two types of modems, namely, internal modem and external modem. RJ45 connector: — The RJ Registered Jack connectors are the plug-in devices used in the networking and telecommunications applications. They are used primarily for connecting LANs, particularly Ethernet.

Ethernet Card : — It is a hardware device that helps in connection of nodes within a network. Hub: A hub is a hardware device used to connect several computers together.The Internet.

Protocols and Standards. Network Models, Layered Tasks. The OSI Model.

Data Communication and Computer Network - DCCN Study Materials

Layers in the OSI Model. Physical Layer Media. Data and Signals, Analog and Digital. Periodic Analog Signals. Digital Signals. Transmission impairment.

data communication and computer networks lecture notes pdf

Data Rate Limits, Performance. Digital Transmission. Digital-to-Digital Conversion. Analog-to-Digital Conversion, Analog Transmission.

Digital-to-analog Conversion. Analog-to-analog Conversion. Bandwidth utilization: Multiplexing and Spreading, Multiplexing. Spread Spectrum. Transmission Media, Guided media. Circuit-Switched Networks. Dntagram Networks, Virtual-Circuit Networks.

Structure of a Switch. Telephone Networks. Dial-up Modems. Digital Subscriber Line. Cable TV Networks. Cable TV for data transfer. Data Link Control. Flow and Error Control. Multiple Access. Standard Ethernet. Changes in the Standard. Fast Ethernet,Gigabit Ethernet. Connecting Devices. Sonet Layers. Sonet Frames. Virtual Tributaries. Network Layer: Delivery.The Internet.

Protocols and Standards. Network Models, Layered Tasks. The OSI Model.

data communication and computer networks lecture notes pdf

Layers in the OSI Model. Physical Layer Media. Data and Signals, Analog and Digital. Periodic Analog Signals. Digital Signals. Transmission impairment. Data Rate Limits, Performance. Digital Transmission. Digital-to-Digital Conversion. Analog-to-Digital Conversion, Analog Transmission.

signals - analog & Digital - data communication - Bhanu priya

Digital-to-analog Conversion. Analog-to-analog Conversion. Bandwidth utilization: Multiplexing and Spreading, Multiplexing.

data communication and computer networks lecture notes pdf

Spread Spectrum. Transmission Media, Guided media. Circuit-Switched Networks. Dntagram Networks, Virtual-Circuit Networks. Structure of a Switch. Telephone Networks. Dial-up Modems. Digital Subscriber Line. Cable TV Networks. Cable TV for data transfer. Data Link Control.

Flow and Error Control. Multiple Access. Standard Ethernet. Changes in the Standard. Fast Ethernet,Gigabit Ethernet. Connecting Devices. Sonet Layers. Sonet Frames. Virtual Tributaries. Network Layer: Delivery.Physical Layer: Transmission. Media: Magnetic,twisted pair, coaxial cable, fiber optics. ISDN, Cellular radio and communication satellites. Data Link Layer: Framing. Error control, Sliding window protocols one bit, Go back n.

Network Layer: Design issues. Routing algorithms shortest path. Unit-4, Transport Layer: Addressing. World Wide Web. Sunday, April 12, All Tricks Here. Brave Browser — Get Rs. Tips for Running an Online e-commerce Store. How do I start boot my computer from a USB device….

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DATA COMMUNICATION AND COMPUTER NETWORKS Pdf Notes 2019

Software Engineering Pdf Notes Bca Computer Networks Pdf Notes Bca Visual Basic Pdf Notes Bca Operating System Pdf Notes Bca Java Programming Pdf Notes Bca To browse Academia. Skip to main content. Log In Sign Up. Yogesh M Ghorpade. Any unauthorized reprint or use of this material is prohibited.

Our aim is to explain the enduring concepts underlying all computer systems, and to show you the concrete ways that these ideas affect the correctness, performance, and utility of your networking concepts. This book is written from a fundamental and advance Network concept perspective.

You will also be prepared to delve deeper, studying such topics as IPv6, Routing Protocols, and Advance Network security. She has been my inspiration and motivation for continuing to improve my knowledge and move my career forward. I dedicate this book to her and my son Suyog for always making me smile and for understanding on those weekend evening when I was writing this book instead of other activities.

I hope that one day they can read this book and understand why I spent so much time in front of my computer.

Notes for Data Communication and Computer Network - DCCN by Verified Writer

My brothers, and my in-laws, have always supported me throughout my career and authoring this book and I really appreciate it. My senior and most respected, Dr. Acharya, who showed me the ropes in networking. Tajuddin is a great person and a scholar; without him, this book may not have been written. I also thank Prof. Kaiwade, Prof. Rajesh and Prof. Junaid for their support to make this book appear good. At the end, I sincerely thank Dr. Ganesan, Prof. Jawed Khan for the confidence reposed in me and giving me this opportunity to reach out the students of management studies.

Link Layer Communication 1 Error detection and correction techniques 2 Framing. IPv6 1 Introduction 2 Packet format, addressing scheme, security, applications and limitations of IPv6. Components, Data Representation, Data Flow 2. Interconnection of Networks: Internetwork. Protocol Layering, OSI model 7.

The media may be cables, microwaves. The computer or device that is used for sending data is called sender, source or transmitter. In modern digital communication system, the source is usually a computer. The means through which data is sent from one location to another is called transmission medium. If the receiver and transmitter are within a building, a wire connects them.

If they are located at different locations, they may be connected by telephone lines, fiber optics or microwaves. The device or computer that receives the data is called receiver. The receiver can be a computer, printer or a fax machine. There are rules under which data transmission takes place between sender and receiver.


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