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Data Communication and Computer Networks Page 10 3. BUS: A bus topology is multipoint. One long cable acts as a backbone to link all the devices in a network. Nodes are connected to the bus cable by drop lines and taps. A drop line is a connection running between the device and the main cable. A tap is a connector that either. Chapter 1 Data Communications, Data Networks, and the Internet 8 1.1 Data Communications and Networking for Today’s Enterprise 9 1.2 A Communications Model 16 1.3 Data Communications 19 1.4 Networks 22 1.5 The Internet 25 1.6 An Example Configuration 30 Chapter 2 Protocol Architecture,TCP/IP, and Internet-Based Applications 32. DATA AND COMPUTER COMMUNICATIONS EIGHTH EDITION SOLUTIONS. Download Data and Computer Communications, 10/e (William Stallings Books on Computer and Data Communications) Pdf in PDF and EPUB Formats for free. Data and Computer Communications, 10/e (William Stallings Books on Computer and Data Communications) Pdf Book is also available for Read Online, mobi, docx and mobile and kindle reading. Please use the link provided below to generate a unique download link which is valid for 24hrs.

Here you can download the free lecture Notes of Data Communication Pdf Notes – DC Notes Pdf materials with multiple file links to download. The Data Communication Notes pdf (data communication lecture notes) book starts with the topics covering Model of Digital Communication Systems, PCM Generation and Reconstruction, Introduction, ASK,ASK Modulator, Pulse shaping for optimum transmissions, Information and entropy, conditional entropy and redundancy, Matrix description of Linear Block Codes, Decoding using State, Etc.

Data Communication Pdf Notes – DC notes pdf file

Complete Notes

Link:Complete Notes

Note :- These notes are according to the R09 Syllabus book of JNTU.In R13 and R15,8-units of R09 syllabus are combined into 5-units in R13 and R15 syllabus. If you have any doubts please refer to the JNTU Syllabus Book.

Topics covered in data communication lecture notes

Unit-I

Elements of Digital Communication Systems: Model of Digital Communication Systems. Digital Representation of Analog Signal, Certain issues in Digital Transmission. Advantages of Digital Communication Systems, Bandwidth-SIN tradeoff. Hartley Shanon Law, Sampling Theorem

Unit-II

Pulse Code Modulation: PCM Generation and Reconstruction, Quantization noise, Non uniform Quantization and Companding, DPCM, Adaptive DPCM. DM and Adaptive DM, Noise in PCM and DM.

Unit-III

Digital Modulation Techniques: Introduction, ASK,ASK Modulator. Coherent ASK Detector, No n-Coherent ASK Detector, PSK, Bandwidth and Frequency Spectrum of FSK. Non coherent FSK Detector, Coherent FSK Detector, PSK Detection Using PLL, BPSK, Coherent PSK Detection. QPSK, Differential PSK.

Uni-IV

Baseband transmission and Optimal Reception of Digital Signal: Pulse shaping for optimum transmissions, ABaseband Signal Receiver, Probability of Error, Optimum Receiver, optimal of Coherent Reception, Signal Space Representation and Probability of Error, eye diagrams, Cross talk.

Data Communication Notes pdf – DC Notes Pdf

Unit-V

Information Theory: Information and entropy, conditional entropy and redundancy, Shannon Fano coding, Mutual Information, information loss due to noise, source codings – Huffman Code, variable length coding, Source coding to Increase average lnfomtation per bit, Lossy source coding.

Unit-VI

Linear Block Codes: Matrix description of Linear Block Codes. Error detection and error Correction capabilities of linear block codes. CyDecoding.

Unit VII

Convolution Codes: Encoding. Decoding using State, tree and trellis diagrams, Decoding using Viterbi algorithm, Comparison of Error Rates in Coded and Uncoded Transmission.

Unit-VIII

Spread Spectrum Modulation: Use of Spread Spectrum, Direct Sequence Spread Spectrurn(DSSS), Code Division Multiple Access, Ranging using DSSS. Frequency Hopping Spread Spectrum, PN – sequences: Generation . and Characteristics. Synchronization in Spread Spectrum Systems and for more please download the above PDF file.

Reference:

Text books:

1. Introduction to Data Communications and Networking, Wayne Tomasi, Pearson Education.

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Frequently Asked Questions

Q1: What is computer network and how are they classified?

A1: Computer network is a system of interconnected computers and computerized peripherals like printers. This interconnection among the computers makes it possible for the information to share among them. Information will be shared through this medium and thus the data is communicated. The communication happens either by wired or wireless media. These networks are classified based on the following factors

• Inter connectivity
• Architecture
• Administration
• Geographical span

Q2: What are the network applications?

A2: To form a network, Computer systems and peripherals are connected with each other. Some of the advantages or application are,

• Instant messaging
• IP phones
• Exchange of information by means of emails and FTP
• Video conferences
• Parallel computing
• Resource sharing such as printers and storage devices
• Information sharing

Q3: What is Personal Area Network?

A3: Smallest network that is very personal to user is called A Personal Area Network (PAN) which may include Bluetooth enabled devices or infra-red enabled devices. This network has approximately 10 meters of connectivity range. It may include wireless mouse, keyboard, printers, bluetooth etc.

Q4: What is ethernet?

A4: Invented by Bob Metcalfe and D R Boggs in 1970, it is deployed Local Area Network (LAN) technology which shared media. Network using shared media has high chances of data collision. Using collision detection technology or carrier sens multi access, ethernet detects collision. All the hosts roll back on the occurrence of collision in Ethernet. Later, wait for some amount of time and re transmit the data. It is equipped with 48-bits MAC (a network interface card) addressing other Ethernet devices to identify and communicate with remote devices in Ethernet. Traditional Ethernet utilizes 10BASE-T specifications. The specification are as follows,

• 10 indicates 10 MBPS speed
• BASE means for baseband, and
• T stands for Thick Ethernet

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Data Computer Communications Pdf Template

• DCN Tutorial

• Physical Layer

• Data Link Layer

• Network Layer

• Transport Layer

• Application Layer

• DCN Useful Resources

• Selected Reading

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.

This tutorial should teach you basics of Data Communication and Computer Network (DCN) and will also take you through various advance concepts related to Data Communication and Computer Network.

Why to Learn Data Communication & Computer Network?

Data Communications And Networking Pdf

Network Basic Understanding

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.

Network Engineering

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.

Internet

A network of networks is called an internetwork, or simply the internet. It is the largest network in existence on this planet.The internet hugely connects all WANs and it can have connection to LANs and Home networks. Internet uses TCP/IP protocol suite and uses IP as its addressing protocol. Present day, Internet is widely implemented using IPv4. Because of shortage of address spaces, it is gradually migrating from IPv4 to IPv6.

Types Of Computer Communications

Internet enables its users to share and access enormous amount of information worldwide. It uses WWW, FTP, email services, audio and video streaming etc. 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.

Applications of Communication & Computer Network

Computer systems and peripherals are connected to form a network.They provide numerous advantages:

• Resource sharing such as printers and storage devices
• Exchange of information by means of e-Mails and FTP
• Information sharing by using Web or Internet
• Interaction with other users using dynamic web pages
• IP phones
• Video conferences
• Parallel computing
• Instant messaging

Data Computer Communications Pdf

Audience

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.

Prerequisites

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.