Friday

Standards and Standard Organizations

 

Network Standards Organizations

Introduction to Standards

Standards are essential to ensure compatibility and interoperability between different systems and devices. They ensure that products from different manufacturers can work together as expected.

Why We Need Standards

  • Create and maintain an open and competitive market for equipment manufacturers
  • Guarantee national and international interoperability of data, telecommunication technology and processes
  • Provide fixed quality and products to customers
  • Allow products to be reused in different contexts
  • Aid the design and implementation of ideas
  • Provide guidelines to manufacturers, vendors, government agencies and other service providers to ensure interconnectivity

Types of Data Communication Standards

De facto (from the fact)

  • Standards that have not been approved by an organized body
  • Adopted as standards through widespread use
  • Often established originally by manufacturers to define the functionality of a new product or technology

De jure (by law)

  • Standards that have been legislated by an officially recognized body

Standards are developed through the cooperation of standards creation committees, forums, and government regulatory agencies.

Standards Creation Committees

ITU (International Telecommunications Union, formerly CCITT)

  • Establishes standards for telecommunication in general and data systems in particular

ISO (International Standards Organization)

  • Active in developing cooperation in scientific, technological, and economic activities
  • Develops standards for many aspects of networking

ANSI (American National Standards Institute)

  • Private nonprofit corporation affiliated with the U.S. federal government

IEEE (Institute of Electrical and Electronics Engineers)

  • Aims to advance theory, creativity, and product quality in electrical engineering, electronics, radio, and related branches of engineering
  • Oversees development and adoption of international standards for computing and communications
  • Creates standards for wireless networking and networking hardware
  • Website: http://standards.ieee.org/

EIA (Electronic Industries Association)

  • Nonprofit organization devoted to promoting electronics manufacturing concerns
  • Activities include public awareness education and lobbying efforts in addition to standards development
  • Made significant contributions by defining physical connection interfaces and electronic signaling specifications for data communication

IETF (Internet Engineering Task Force)

  • Develops standards specifically for the Internet

Forums

  • Work with universities and users to test, evaluate, and standardize new technologies
  • Speed acceptance and use of technologies in the telecommunications community
  • It presents their conclusions to standard bodies.

Regulatory Agencies

  • Purpose is to protect the public interest by regulating radio, television and wire/cable communications
  • Have authority over interstate and international commerce as it relates to communication

Internet Standards

  • Thoroughly tested specifications that are useful to and adhered to by those who work with the internet
  • Formalized regulations that must be followed
  • A specification begins as an Internet draft and may attain Internet standard status
  • An Internet draft is a working document that may be published as Request for Comment (RFC)
  • RFCs are edited, assigned a number, and made available to all interested parties

Components of Data Communication

 Q. What are the components of Data communication?

The following are the key components in a data communication system:

  1. Message Message is the information to be communicated by the sender to the receiver.
  2. Sender The sender is any device that is capable of sending the data (message).
  3. Receiver The receiver is a device that the sender wants to communicate the data (message).
  4. Transmission Medium It is the path by which the message travels from sender to receiver. It can be wired or wireless and many subtypes in both.
  5. Protocol
    • It is an agreed upon set of rules used by the sender and receiver to communicate data.
    • A protocol is a set of rules that governs data communication.
    • A Protocol is a necessity in data communications without which the communicating entities are like two persons trying to talk to each other in a different language without knowing the other language.

These five components form the foundation of any data communication system. Each component must function properly for successful data transmission to occur. The transmission medium provides the physical or wireless path, while protocols ensure that both sender and receiver understand how to format, send, receive, and interpret the messages being exchanged.


Extra Question: Explain Protocol

DCCN

Text books

Course objectives and Course Outcomes

UNIT I: Fundamentals of Data Communication and Computer Network [08 Hours]

UNIT II
Transmission Media and Switching [08 Hours]
Guided transmission media: Twisted-pair cable, Coaxial cable, Fiber-optic cable, Unguided transmission
media: Radio waves, Microwaves, Infrared, Satellite, Line-of-sight Transmission, Point-to-Point,
Broadcast, Multiplexing: Frequency-division multiplexing, Time - division multiplexing, 

Switching:
Circuit-switched network, Packet switched network.

UNIT III
Error Detection and Correction [08 Hours]
Types of errors, Forward error correction versus retransmission, Framing: fixed sized and variable sized
framing, Error detection: Repetition codes, Parity bits, Checksums, CRC, Error Correction: Automatic
Repeat Request (ARQ), Hamming code, Standard architecture, Features, Bluetooth architecture: Piconet,
Scatternet, Introduction to mobile generations: 3G, 4G and 5G.

UNIT IV
Network Communication Models [08 Hours]


Introduction to protocols: Internet layer - IP, ARP,
ICMP, Transport Layer-TCP and UDP, Application Layer-FTP, HTTP, SMTP, TELNET, DHCP,
Addressing: Physical address, Logical address, Port address, IP address-Concept, Notation, Address
space, IPv4 addressing: Classful and Classless Addressing.

UNIT V
Network Topologies and Network Devices [08 Hours]

Network Computing Model: Peer to Peer, Client server, 



Network topologies: Introduction,

Network connecting
devices: 







Notes:

https://archive.mu.ac.in/myweb_test/syllFybscit/dcn.pdf

Key Components of Data Communication

 




  • Components of Data Communication

    The following are the key components in a data communication system:

    1. Message Message is the information to be communicated by the sender to the receiver.
    2. Sender The sender is any device that is capable of sending the data (message).
    3. Receiver The receiver is a device that the sender wants to communicate the data (message).
    4. Transmission Medium It is the path by which the message travels from sender to receiver. It can be wired or wireless and many subtypes in both.
    5. Protocol
      • It is an agreed upon set of rules used by the sender and receiver to communicate data.
      • A protocol is a set of rules that governs data communication.
      • A Protocol is a necessity in data communications without which the communicating entities are like two persons trying to talk to each other in a different language without knowing the other language.

    These five components form the foundation of any data communication system. Each component must function properly for successful data transmission to occur. The transmission medium provides the physical or wireless path, while protocols ensure that both sender and receiver understand how to format, send, receive, and interpret the messages being exchanged.

  • Extra Question

  • Q. Explain Protocol
  • Process of Data Communication

    Q. 1 What is meant by Data Communication and explain its characteristics?

    Q. 2 Define Data Communication.

    1. Data communication is the process of exchanging information or data between two or more devices through a transmission medium.

    2. Data communication forms the backbone of all computer networks and is essential for technologies like the internet, mobile phones, cloud computing, and virtually all digital services we use today.

    Process of Data Communication

    The basic process follows these steps:

    1. The sender generates the message and converts it into a transmittable signal
    2. The signal travels through the transmission medium
    3. The receiver receives the signal and converts it back into an understandable message
    4. The receiver acknowledges receipt if required by the protocol

    Characteristics of Data Communication

    The effectiveness of any data communications system depends upon the following four fundamental characteristics:

    1. Delivery: The data should be delivered to the correct destination and correct user.
    2. Accuracy: The communication system should deliver the data accurately, without introducing any errors. The data may get corrupted during transmission affecting the accuracy of the delivered data.
    3. Timeliness: Audio and Video data has to be delivered in a timely manner without any delay; such a data delivery is called real time transmission of data.
    4. Jitter: It is the variation in the packet arrival time. Uneven Jitter may affect the timeliness of data being transmitted.

    Characteristics of Effective Data Communication

    • Delivery: The system must deliver data to the correct destination
    • Accuracy: The system must deliver data accurately, without alterations or errors
    • Timeliness: The system must deliver data in a timely manner to be useful
    • Jitter: Refers to the variation in packet arrival time, which should be minimized

    Data and Information

     Data and information are related concepts but have distinct meanings:

    Data

    • Raw, unorganized facts, figures, or symbols
    • Without context or interpretation
    • Examples: numbers, text strings, dates, or binary code
    • On its own, data typically lacks meaning or usefulness

    Information

    • Data that has been processed, organized, structured, or presented
    • Has context, relevance, and purpose
    • Provides meaning and value to the recipient
    • Examples: reports, charts, tables with labeled data, or analyzed statistics

    The key difference is that information is data that has been given context and meaning through processing, organization, or analysis. Data becomes information when it's transformed to be useful for decision-making or understanding.

    For example, "98.6" is just a piece of data, but "The patient's temperature is 98.6°F, which is normal" is information because it provides context and meaning.

    Here is the difference between Data and Information in a tabular format:

    Data

    Information

    Derived from the Latin word "Datum"

    Derived from the word "Informare"

    Data is a raw fact

    Processed form of data

    May or may not be meaningful

    Always meaningful

    Input to any system may be treated as data

    Output after processing data is information

    Understanding is difficult

    Understanding is easy

    Data may not be in order

    Information should be in order

    Example: Survey data

    Example: Census report

     


    Tuesday

    Indian Knowledge System (IKS) - Humanities and Sciences (Assignment)

     


    Unit1:

    A) What is the Indian Knowledge System (IKS)? Explain its significance in today's world.

    B) Discuss the organization of the Indian Knowledge System and its historical development.

    C) What are some of the salient aspects of the Indian Knowledge System?

    D) Why is it important to preserve and promote IKS in modern society?



    Unit2:



    A) Provide an overview of the philosophical systems in ancient India. How did they develop over time?

    B) What is the significance of Linguistics in the Indian Knowledge System? Provide an overview

    C) Explain the principles of Vāstu-śāstra and its application in architecture.

    D) What role does Sanskrit play in modern natural language processing?

    E) What are the distinctive features of Vedic life? How did the Vedas influence daily living in ancient India?  

    F) What does the Arthaśāstra say about town planning? Discuss key principles.

    G) What is the relevance of Arthaśāstra in today's public administration practices?





    Unit3:

    A) Discuss the phonetics and word generation process in the Indian linguistic tradition.

    B) What are the salient aspects of Indian Mathematics? Explain with reference to historical texts.

    C) How were time, distance, and weight measured in ancient India? Discuss with examples.

    d)Provide a brief introduction to the Vedas and explain their significance in Indian culture. 

    E)Discuss the sub-classification of the Vedas. How are they organized?

    F) Give a synopsis of the four Vedas. What are the main messages conveyed through them?




    Unit4:


    A) Discuss the historical evolution of number systems in India. Provide examples.

    B) Explain the historical perspective of Arthaśāstra and its relevance in modern governance.

    c) How were public administration practices reflected in Indian epics like the Mahabharata and Ramayana?

    D) Write Short note on “Temple architecture in India”



    Unit5:

    A) What is the Indian perspective on health and wellness? Discuss key thoughts from Āyurveda.

    B) Define health according to Āyurveda and explain the role of Tri-doṣas in maintaining health.

    c) What are the four states of consciousness in Indian philosophy? Discuss their significance.

    D) How does the Indian approach to consciousness differ from Western perspectives?

    E) Explain the concept of Prakrti and its evolution in Indian psychology.