Computer Networking: Physical Layer | Free Online Course | Alison

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Computer Networking: Physical Layer

In this free online course, learn about computer networking in the physical layer of the TCP/IP protocol stack.

Network and Security
Free Course
In this free online course, you will learn about computer networking and specifically the physical layer of the protocol stack. The various communication tasks in this layer are explained, along with the decoding and encoding techniques. How you can implement network security policies are also discussed. Boost your computer networking knowledge and skills by studying this specialized course.
  • Duration

    1.5-3 Hours
  • Certification

  • Mobile Friendly

  • Publisher

  • Accreditation






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In this free online course, you are introduced to the world of computer networking, with particular focus on the physical layer. You will explore the role of the modem in a network, as well as the differences between baseband and broadband, and the importance of network security. Demonstrations, problems, examples, and assessment questions in this instructor-led video-based course are designed to provide you with a comprehensive foundation which will enable you to take serious steps into understanding this section of the protocol stack.

The course begins by introducing you to the different types of networks that have been developed over the years. Then the different physical layer properties are discussed to help you understand how they may affect our networking capacity. You will explore the different ways of securing a network to minimize the risks of disruptions that can come as a result of an intrusion.

The course includes topics on the communication model, telephone networks, baseband vs broadband, NICs, analog and digital signals, transmission impairment, modulation techniques, network security policies, vulnerability scanning, firewalls and more. This course will be of interest to computer engineering students, networking and programming professionals, or those looking to enhance their career prospects in the computer networking industry. Start this course here today.

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Learning Outcomes

Upon successful completion of this course, you should be able to:

  • Discuss the communication model and network security policies
  • Explain the communication model and communication tasks
  • Describe wide area networks, telephone networks, and hubs
  • Discuss sine waves, transmission impairment, and data rate limits
  • Explain attenuation, distortion, noise, and the signal-to-noise ratio 
  • Describe the encoding and decoding techniques
  • Discuss encoding schemes, modulation techniques, and network security policies
  • Explain transport layer security, application layer security, and firewalls


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