Transport Layer and Network Security | Free Online Course | Alison

Introduction to Transport Layer and Network Security

Learn more about encryption, network security and troubleshooting with this free online course.

Network and Security
Free Course
This free online computer networking course introduces you to the Transport Layer and network security in computer networks. Start the course today and learn about how encryption and port numbers determine which packets belongs to which application. The course is ideal for learners interested in becoming network engineers as it covers topics like routing, TCP, UDP, and how to troubleshoot a network.
  • Duration

    4-5 Hours
  • Assessment

  • Certification

  • Publisher






View course modules


This free online course introdcues you to security in computer networks by explaining the two types of transport layers - the connection orientated protocols, and the connection less protocols. Next, the course teaches you about UDP on a Cisco packet tracer. For a router to be able to forward packet from source to destination, it needs is a mapping between destination IP address and the port number of this router.

The course introduces you to the most essential part of encryption which is changing the human readable form using some mathematical function. You'll how port numbers help communication between one application and another - by assigning these port numbers the applications are able to determine which packet belongs to which application.

Start this course today and you will gain knowledge computer networks including routing, dynamic routing with distance vector, Transport Layer, TCP, UDP, UDP on a Cisco packet tracer, encryption, network security and troubleshooting.

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Learning Outcomes

Having completed this course you will be able to:

  • Identify the concept of transport layer in a network
  • Discuss TCP and UDP on Cisco Packet Tracer
  • Identify how to troubleshoot a network and challenges of troubleshooting
  • Recognize different types of encryption and how to code and decode using different keys
  • Differentiate between network security, information on data security, cyber and internet security and certain securities that relate to the computer


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 an official Certificate, which is a great way to share your achievement with the world. Your Alison Certificate 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

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