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Digital Communication Networks

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  • Description
  • Outcome
  • Certification
  • Modern society across the world is becoming increasingly dependent on communication networks. We depend on them for the smooth operation of economic and social activities. This course examines networks as the means of interconnecting devices so that two-way communication is possible. It examines protocols like HTTP, TCP/IP and ATM as well as the OSI reference model, and provides an overview of the topic for learners who have no significant prior knowledge of the subject. The main topics covered in this course are: Internet protocol (IP), the Open Systems Interconnection (OSI) model, Transmission Control Protocol (TCP), Hypertext transfer protocol (HTTP), and Asynchronous Transfer Mode (ATM). Areas that are also covered include the layers of communication, vertical and horizontal communication, protocol architecture, Domain name system, the ATM layers, and an analysis of IP over ATM. This course will be of interest to professionals who work in information technology, network design, and network management, and will also be of interest to students who would like a greater understanding of how networks function.

  • After studying this unit you should be able to:
    - evaluate technical descriptions of communication protocols and demonstrate your understanding of their operation;
    - describe the characteristics of circuit-switched and packet-switched networks, and of connectionless and connection-oriented modes in packet-switched networks;
    - describe the role played by primitives in the OSI reference model;
    - explain how ‘vertical’ and ‘horizontal’ communication takes place in the OSI reference model;
    - describe the main functions of the principal protocols in the TCP/IP architecture;
    - describe how application software interacts with the TCP/IP protocol software through application program interfaces;
    - find the network and host addresses from IPv4 addresses;
    - describe the main functions of each of the layers of the ATM reference model;
    - explain the role that virtual path identifiers and virtual channel identifiers play in forwarding ATM cells;
    - describe how label switching can support IP over ATM.

  • All Alison courses are free to study. To successfully complete a course you must score 80% or higher in each course assessments. Upon successful completion of a course, you can choose to make your achievement formal by purchasing an official Alison Diploma, Certificate or PDF.

    Having an official Alison document is a great way to share your success. Plus it’s:

    • Ideal for including in CVs, job applications and portfolios
    • An indication of your ability to learn and achieve high results
    • An incentive to continue to empower yourself through learning
    • A tangible way of supporting the Alison mission to empower people everywhere through education.

Modules List( 7 )
  • Module 1: OSI reference model
    • Protocols in multi-service networks- Introduction
    • Course overview
    • OSI reference model-Layers of communication
    • Communication
    • Examples of layer functions
  • Module 1: OSI reference model - READING MATERIALS
  • Module 2: TCP-IP protocol architecture
    • TCP-IP protocol architecture
    • What does TCP/IP protocol architecture do?
    • Domain name system
    • Hypertext transfer protocol (HTTP)
    • Transmission control protocol (TCP)
    • Internet protocol (IP) - Part 1
    • Internet protocol (IP) - Part 2
  • Module 2: TCP-IP protocol architecture - READING MATERIALS
  • Module 3: ATM protocol architecture
    • What is ATM protocol architecture?
    • ATM layers
    • IP over ATM
    • Summary
  • Module 3: ATM protocol architecture - READING MATERIAL
  • Module 4: Digital Network Security
    • Introduction to Network Security
    • Vulnerability to Threat and Attack
    • Importance of Effective Network Security Strategies
    • Typical Network Security When Using Your Computer
  • Module 5: Threats to Digital Networks
    • The Development of Network Security Measures
    • Terminology about Data Storage, Processing or Transmission
    • Digital Dangers - Audio File
    • Passive Attacks and Active Attacks
    • Potential Network Vulnerabilities
    • Tapping into Transmission Media
  • Module 6: Digital Networks - Authentication and Access Control
    • Overview of Authentication Methods
    • Certification Authorities and Digital Certificates
    • Access Control - Passwords
    • Access Control - Firewalls
    • Packet-Filtering Router
    • Application Level and Circuit Level Gateways
    • Examples of Firewall Implementation
  • References
  • Module 7: Digital Network Assessment
    • Digital Network Assessment
Topics List ( 5 )
Module 1: OSI reference model
In this module you will learn about the OSI reference model.
Topics List ( 4 )
Module 3: ATM protocol architecture
In this module you will learn about the ATM protocol architecture.
Topics List ( 1 )
Module 7: Digital Network Assessment
You must score 80% or more to pass this assessment.
Course Features
  • Duration

    2-3 Hours

  • Publisher


  • Video


  • Audio


  • Assessment


  • Certification


  • Price


  • Reward

    50 Pts

  • Responsive


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