Design and subnet an office network
Plan addressing, VLANs and routing for a small organisation and document it.
Online classes · Beginner to Intermediate
Online Networking & Security Course: From the OSI Model to Firewalls
Understand how networks work and how to protect them, from the OSI model and subnetting to firewalls and access control.
- 17 modules
- 4 portfolio projects
- Beginner to Intermediate
- Online classes
Course Overview
Networking is how devices find and talk to each other; network security is how those conversations are protected. The SkillNewton Networking & Security Course teaches both from first principles in online classes, using the OSI and TCP/IP models as the map for everything that follows.
You learn IP addressing and subnetting, how DNS, DHCP and HTTP work, how routers and switches move traffic, and how to administer and troubleshoot Linux systems. The security modules then cover authentication and authorisation, firewalls and access control, common threats and the defensive practices used to reduce risk.
The course is lab-based, using software labs you run on your own computer. You design, configure and troubleshoot networks yourself, which builds the habits needed for network administration, support and entry-level security roles.
What you will be able to do
- Design and subnet a small office network
- Troubleshoot connectivity with a structured method
- Administer a Linux host from the command line
- Apply firewall and access-control fundamentals
Networking & Security Course Curriculum
17 modules in 3 stages. Each stage builds on the last, and every module is practised, not just read.
01 Foundation7 modules
- 01
Networking fundamentals
Devices, media, LANs, WANs and how data is packaged for transmission.
- 02
OSI model
The seven layers and how they map to real protocols and devices.
- 03
TCP/IP
The internet protocol suite, TCP versus UDP and the three-way handshake.
- 04
IP addressing
IPv4 and IPv6 addresses, private ranges and NAT.
- 05
Subnetting
CIDR notation and dividing networks by hand.
- 06
Ports and protocols
Well-known ports and what runs on them.
- 07
DNS, DHCP and HTTP/HTTPS
Name resolution, automatic addressing and web traffic with TLS.
02 Intermediate4 modules
- 08
Routing and switching
MAC tables, VLANs, routing tables and default gateways.
- 09
Network administration concepts
Documentation, monitoring and change management.
- 10
Linux fundamentals
The shell, files, permissions, users, services and networking commands.
- 11
Network troubleshooting
A layer-by-layer method using ping, traceroute, dig and packet captures.
03 Security6 modules
- 12
Security fundamentals
Confidentiality, integrity and availability, risk and defence in depth.
- 13
Network security
Segmentation, secure protocols and monitoring.
- 14
Firewalls and access control
Rule design, stateful filtering and least privilege.
- 15
Authentication and authorization
Passwords, MFA, keys and role-based access.
- 16
Threats and defensive concepts
Malware, phishing, misconfiguration and how organisations defend against them.
- 17
Practical labs and projects
Designing, securing and documenting a complete small network.
Projects You Will Complete
Practical work is the core of the course. Each project becomes part of your portfolio.
Packet analysis with Wireshark
Capture and explain DNS, TCP and HTTPS traffic on a lab network.
Linux server hardening
Configure users, permissions, SSH keys and a host firewall on a Linux server.
Firewall and access-control policy
Write and test rules that enforce least privilege between network segments.
Tools and Technologies
You practise on the same tools professionals use. Everything listed is free or has a free tier.
- Wireshark
- Packet Tracer
- Linux (Ubuntu)
- Nmap
- iptables / ufw
- OpenSSH
Course Format
The Networking & Security Course is taught in online classes, so you can learn from any city in India without travelling or relocating. All you need is a computer, a stable internet connection and the free tools listed above.
- ModeOnline classes
- LevelBeginner to Intermediate
- Schedule and durationShared on enquiry for the current batch
- Assessment4 practical projects
Where These Skills Are Used
Common roles and paths that use what this course teaches. Outcomes depend on your effort and the market; we do not promise jobs.
Network support engineer
Installing, maintaining and troubleshooting networks.
System administrator
Running Linux and Windows servers and the services on them.
IT support and helpdesk
Resolving connectivity and access problems for users.
Junior security analyst
Monitoring, hardening and responding to security alerts.
Further certification
A foundation for vendor certifications in networking and security.
Networking & Security Course FAQs
Do I need any IT background for this course?
No. The course starts with what a network is and builds up step by step. Binary and subnetting maths are taught from scratch.
What is the difference between networking and network security?
Networking is about connecting devices so data reaches the right place. Network security is about protecting that data and those devices from unauthorised access and misuse. You need the first to do the second well.
Does the course teach Linux?
Yes. You learn the command line, files and permissions, users, services and the networking commands used to configure and troubleshoot Linux systems.
Is the course hands-on?
Yes. Concepts are practised in labs: subnetting, configuring routing, capturing packets, hardening a Linux server and writing firewall rules.
Does it prepare me for certifications?
The course covers the fundamentals that common entry-level networking and security certifications build on. It is not a certification itself, and certification exams are taken separately.
Is ethical hacking covered?
The course focuses on defensive security: understanding threats and protecting systems. Tools such as Nmap and Wireshark are used only on lab networks you are authorised to test.
Can networking be learned online?
Yes. Classes are online and labs use network simulators, virtual machines and Linux on your own computer, so you practise configuration and troubleshooting without physical equipment. Contact us for the current schedule.
Free Guides to Start With
Read these before you enrol to see how the course explains things.
Networking Basics
What is computer networking? Read guide
OSI Model
What is the OSI model? Read guide
TCP/IP
What is TCP/IP? Read guide
Routing & Switching
What is the difference between routing and switching? Read guide
Linux
Why should network and security beginners learn Linux? Read guide
Network Security
What is network security? Read guide
Enquire About the Online Networking & Security Course
Send your details and we will reply with the current online batch schedule, fees and next steps.
- 17 modules from fundamentals to intermediate
- 4 portfolio projects
- Online classes, join from anywhere in India
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