Welcome to the Network Security course — your step into the world of securing Cisco networks. This course makes security simple and practical. You’ll learn how data travels, how attackers exploit it, and how Access Control Lists (ACLs) protect your network.
With clear lessons, visual diagrams, and guided labs, you’ll move from TCP/IP fundamentals to real security configurations used by network engineers every day.
About
The Network Security course introduces you to the essential tools and methods used to protect modern networks. You’ll learn how TCP and UDP work, how HTTP and DNS can be exploited, and how ACLs help filter traffic to keep your network secure.
This course focuses on Access Control Lists (ACLs), one of the most common security tools in Cisco networks. You’ll start with simple standard ACLs, then move to extended ACLs for advanced filtering. By the end, you’ll be able to configure and verify ACLs confidently in your own lab or on real devices.
What you'll learn
- Understand TCP/IP protocols: Learn how TCP and UDP manage network connections and how attacks target them.
- Secure common services: Understand how HTTP and DNS work and how to protect them using ACLs.
- Implement Access Control Lists: Configure and apply both standard and extended ACLs on Cisco routers.
- Filter and control network traffic: Learn how to permit or deny packets based on IP, port, and protocol.
- Hands-on labs: Practice security configuration through guided labs and real network scenarios.
Skills you'll gain
Who is this for?
Designed for CCNA students and junior network engineers who want to understand and apply basic security controls. A solid grasp of IPv4 helps, but the course explains everything from the ground up.
Course Info
- Learning Path: CCNA Enterprise Infrastructure
- Exam relevance: Aligned with CCNA 200-301 security topics
- Prerequisites: Basic networking knowledge
- Sections: TCP/IP Overview, ACL Basics, Extended ACL
- Labs: Includes practical ACL configuration labs
- Created: 17 Oct 2025
- Updated: 17 Oct 2025
Course Structure
The course includes three main sections: TCP/IP Protocols Overview, ACL Basics, and Extended ACL. You’ll start by understanding the fundamentals of TCP, UDP, HTTP, and DNS. Then, you’ll move on to creating and testing ACLs to secure traffic.
Every lesson connects theory with practice. Labs like “Implementing Standard ACLs” help you apply what you’ve learned on real Cisco devices or in simulators like Packet Tracer or EVE-NG.
Outcomes
After finishing this course, you’ll understand how TCP/IP protocols work, how ACLs protect your network, and how to configure them correctly. You’ll be able to identify weak points and apply filters that block unwanted traffic.
These skills are essential for any network engineer aiming to design secure networks and pass the CCNA exam with confidence.
