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Digital Communication Networks

Network and Security
Free Course

Understand how computers in digital networks communicate with each other.

  • Duration

    2-3 Hours
  • Assessment

    Yes
  • Certification

    Yes
  • Publisher

    OpenLearn
Description Outcome Certification View course modules

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 enrol, study and complete. To successfully complete this Certificate course and become an Alison Graduate, you need to achieve 80% or higher in each course assessment. Once you have completed this Certificate course, you have the option to acquire official Certification, which is a great way to share your achievement with the world. Your Alison Certification is:

Ideal for sharing with potential employers - include it in your CV, professional social media profiles and job applications
An indication of your commitment to continuously learn, upskill and achieve high results
An incentive for you to continue empowering yourself through lifelong learning

Alison offers 3 types of Certification for completed Certificate courses:

Digital Certificate - a downloadable Certificate in PDF format, immediately available to you when you complete your purchase
Certificate - a physical version of your officially branded and security-marked Certificate, posted to you with FREE shipping
Framed Certificate - a physical version of your officially branded and security-marked Certificate in a stylish frame, posted to you with FREE shipping

All Certification is available to purchase through the Alison Shop. For more information on purchasing Alison Certification, please visit our faqs. If you decide not to purchase your Alison Certification, you can still demonstrate your achievement by sharing your Learner Record or Learner Achievement Verification, both of which are accessible from your Dashboard. For more details on our Certification pricing, please visit our Pricing Page.

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