When you enroll in this course, you'll also be enrolled in this Specialization.
Learn new concepts from industry experts
Gain a foundational understanding of a subject or tool
Develop job-relevant skills with hands-on projects
Earn a shareable career certificate
There are 9 modules in this course
Unlock the essential skills needed to understand and navigate today’s interconnected world with our comprehensive introduction to computer networks. In this course, you’ll explore how devices communicate and share resources, gaining insight into the foundational role networks play in modern life. You’ll discover different network types based on their geographical scope, and learn the strengths and limitations of various network topologies in terms of scalability, fault tolerance, and performance.
A key highlight of this course is a clear, approachable introduction to the Open Systems Interconnection (OSI) model, breaking down each layer for easy understanding. You’ll also explore network segmentation and the latest in wireless technologies, equipping you with knowledge relevant to real-world applications.
What makes this course unique is its practical focus and accessible explanations, designed for both beginners and those looking to refresh their knowledge. By the end of the course, you will confidently describe core concepts in network architecture, giving you a strong foundation for further study or career advancement in IT and networking.
The complexity of a deployed network infrastructure depends on the scale of its deployment. Depending on the scale of deployment, they are primarily classified into three categories: LAN, WAN, and cloud. In this module, you will learn about their characteristics, similarities, and differences.
Network Categories: LANs, WANs, and Cloud•15 minutes
1 assignment•Total 6 minutes
Knowledge Check - Network Categories: LANs, WANs, and Cloud•6 minutes
OSI Network Models
Module 2•19 minutes to complete
Module details
To define interoperability between network devices and software, the ISO created the OSI model to serve as a framework on which a suite of protocols can be built. In this module, you will learn about the popular OSI model and its seven layers.
What's included
1 video1 reading1 assignment
Show info about module content
1 video•Total 8 minutes
OSI Network Models•8 minutes
1 reading•Total 8 minutes
OSI Model•8 minutes
1 assignment•Total 3 minutes
Knowledge Check - OSI Network Models•3 minutes
Network Models
Module 3•1 hour to complete
Module details
The TCP/IP model represents a protocol suite. It is similar to the ISO OSI model in that it uses layers to organize protocols. TCP/IP protocols are actively used in actual networks today. In this module, you will learn about the TCP/IP model and the different layers that constitute it.
What's included
3 videos3 readings1 assignment
Show info about module content
3 videos•Total 12 minutes
Network Models: TCP•2 minutes
Comparing OSI and TCP/IP•2 minutes
Layer 2 and Layer 3 Networks•8 minutes
3 readings•Total 23 minutes
TCP/IP Protocol Suite•8 minutes
Comparing OSI and TCP/IP•8 minutes
Layer 2 and Layer 3 Networks•7 minutes
1 assignment•Total 9 minutes
Knowledge Check -Network Models: TCP/IP, OSI and TCP/IP comparison, Layer 2 and Layer 3 networks•9 minutes
IP Addressing, Forwarding, and Routing
Module 4•22 minutes to complete
Module details
In this module, you will learn the significance of IP addresses and how routers route packets to their destinations.
What's included
1 video1 reading1 assignment
Show info about module content
1 video•Total 9 minutes
IP Addressing, Forwarding, and Routing•9 minutes
1 reading•Total 10 minutes
IP Addressing, Forwarding, and Routing•10 minutes
1 assignment•Total 3 minutes
Knowledge Check - IP Addressing, Forwarding, and Routing•3 minutes
Comparing IPv4 and IPv6
Module 5•19 minutes to complete
Module details
IPv4 provides approximately 4 billion unique addresses. Although 4 billion is a large number of addresses, it is not enough to keep up with the growth of the internet. In this module, you will learn about IPv6, which tries to solve the problem of IP exhaustion.
What's included
1 video1 reading1 assignment
Show info about module content
1 video•Total 11 minutes
Evaluating IPv4 and IPv6•11 minutes
1 reading•Total 5 minutes
Comparing IPv4 and IPv6•5 minutes
1 assignment•Total 3 minutes
Knowledge Check - Comparing IPv4 and IPv6•3 minutes
Transport Layer
Module 6•20 minutes to complete
Module details
In this module, you will learn about the transport layer and its responsibilities.
What's included
1 video1 reading1 assignment
Show info about module content
1 video•Total 11 minutes
TCP and UDP - Transport Layer•11 minutes
1 reading•Total 6 minutes
Transport Layer•6 minutes
1 assignment•Total 3 minutes
Knowledge Check - Transport Layer•3 minutes
Network Segmentation
Module 7•24 minutes to complete
Module details
Segmentation divides a computer network into smaller parts. The purpose is to improve network performance and security. Other terms that often mean the same thing are network segregation, network partitioning, and network isolation.
What's included
3 videos1 reading1 assignment
Show info about module content
3 videos•Total 11 minutes
Network Segmentation - VLANs•5 minutes
VXLAN•2 minutes
Virtual routing and forwarding (VRF)•4 minutes
1 reading•Total 10 minutes
Virtual LAN•10 minutes
1 assignment•Total 3 minutes
Knowledge Check - Network Segmentation•3 minutes
Wireless Network Technologies
Module 8•16 minutes to complete
Module details
One of the most important aspects of wireless operation is how Wi-Fi operates over the air. In this module, you will learn the basics of Wi-Fi technologies, Wi-Fi 6E and 5G.
The Cisco Learning and Certifications organization is a worldwide leader in training and education programs that foster the development of careers in networking and other technology areas. The organization caters to a global community of students, partners, customers, and employees who seek the most up-to-date training on Cisco technologies and certifications.
When will I have access to the lectures and assignments?
To access the course materials, assignments and to earn a Certificate, you will need to purchase the Certificate experience when you enroll in a course. You can try a Free Trial instead, or apply for Financial Aid. The course may offer 'Full Course, No Certificate' instead. This option lets you see all course materials, submit required assessments, and get a final grade. This also means that you will not be able to purchase a Certificate experience.
What will I get if I subscribe to this Specialization?
When you enroll in the course, you get access to all of the courses in the Specialization, and you earn a certificate when you complete the work. Your electronic Certificate will be added to your Accomplishments page - from there, you can print your Certificate or add it to your LinkedIn profile.
Is financial aid available?
Yes. In select learning programs, you can apply for financial aid or a scholarship if you can’t afford the enrollment fee. If fin aid or scholarship is available for your learning program selection, you’ll find a link to apply on the description page.