Lecture in Introduction to Data Communications and Networking

(Last Updated On: December 8, 2017)
Introduction to Datacommunication and Networking

Lesson Objectives – the students should be able to:

  • Define Data Communications
  • Enumerates and understand the functions of each components of Data Communications
  • Understand Data Representations and Data Flow
  • Define Networks
  • Understand Distributed Processing, Network Criteria, Physical Structures, Network Models
  • Enumerates the Categories of Network
  • Learn Interconnection of Network: Internetwork
  • Define the Internet
  • Know the brief history of Internet
  • Define Protocols and Standard

Lecture on Introduction to Datacommunication and Networking PPT

List of Data Communications Course Outline and Lectures

Definition of Terms

  • Data communication is the transfer of data from one device to another via some form of transmission medium.
  • A data communications system must transmit data to the correct destination in an accurate and timely manner.
  • A network is a set of communication devices connected by media links.
  • Topology refers to the physical or logical arrangement of a network. Devices may be arranged in a mesh, star, bus, or ring topology.
  • An internet is a network of networks.
  • The Internet is a collection of many separate networks.
  • TCP/IP is the protocol suite for the Internet.
  • A protocol is a set of rules that governs data communication; the key elements of a protocol are syntax, semantics, and timing.
  • Standards are necessary to ensure that products from different manufacturers can work together as expected.
  • Forums are special-interest groups that quickly evaluate and standardize new technologies.
  • A Request for Comment (RFC) is an idea or concept that is a precursor to an Internet standard.

Five Components of Data Communications

  • message
  • sender
  • receiver
  • medium
  • protocol

Different forms of information

  • Text
  • numbers
  • images
  • audio
  • video

Data flow between two devices

  • Simplex – Only one of the two devices on a link can transmit; the other can only receive.
  • Half-duplex – Each station can both transmit and receive, but not at the same time.
  • Full-duplex – Both stations can transmit and receive simultaneously.

Three criteria for an effective and efficient network

  • Performance – Measured in many ways, including transit time and response time. It is evaluated by two networking metrics: throughput and delay.
  • Reliability – Measured by the frequency of failure, the time it takes a link to recover from a failure, and the network’s robustness in a catastrophe.
  • Security – Include protecting data from unauthorized access, protecting data from damage and development, and implementing policies and procedures for recovery from breaches and data losses.

Types of Connection (Line configurations)

  • Point-to-point connection – two and only two devices are connected by a dedicated link.
  • Multipoint connection – three or more devices share a link.

Four Basic Topologies

  • Mesh – Every device has a dedicated point-to-point link to every other device.
  • Star – Each device has a dedicated point-to-point link only to a central controller, usually called a hub.
  • Ring – Each device has a dedicated point-to-point connection with only the two devices on either side of it.
  • Bus – One long cable acts as a backbone to link all the devices in a network.

Network Categories

  • Local area network (LAN) – data communication system within a building, plant, or campus, or between nearby buildings.
  • Metropolitan-area network (MAN) – data communication system covering an area the size of a town or city.
  • Wide area network (WAN) – data communication system spanning states, countries, or the whole world.

Internet service providers (ISPs)

  • Local
  • Regional
  • National
  • International

Key Elements of a Protocol

  • Syntax – structure or format of the data, meaning the order in which they are presented.
  • Semantics – the meaning of each section of bits.
  • Timing – refers to two characteristics: when data should be sent and how fast they can be sent.

Some of the organizations involved in standards creation

  • ISO
  • ITU-T
  • ANSI
  • IEEE
  • EIA
Note: Lets see how well you the understand the first chapter and try answering the Multiple Choice Questions here.

List of Data Communications Lectures

credit: Behrouz A. Forouzan©2013 www.PinoyBIX.org
Lecture in Introduction to Data Communications and Networking
Rate this:

Add Comment

© 2017 PinoyBIX Engineering. © 2017 All Rights Reserved | Donate
Basic Television - Grob TV  Chapter Exercises
Basic Television – Grob TV Chapter Exercises
Series of Multiple Choice Questions in Engineering Mathematics
Series of Multiple Choice Questions in Engineering Mathematics
Complete Practice Quiz in Electronic Devices and Circuit Theory
Complete Practice Quiz in Electronic Devices and Circuit Theory
Complete Practice Quiz in Data Communications and Networking
Complete Practice Quiz in Data Communications and Networking
Online Tool: Color Code Conversions
Online Tool: Color Code Conversions
Online Tool: Weight Measurement Conversions
Online Tool: Weight Measurement Conversions
Online Tool: Temperature Measurement Conversions
Online Tool: Temperature Measurement Conversions
Online Tool: Length Measurement Conversions
Online Tool: Length Measurement Conversions

Get FREE Review Course
in your inbox

Subscribe to our mailing list and get reviewers and updates to your email inbox.

Thank you for subscribing.

Something went wrong.