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Networking Fundamentals

Network Security

Networking Fundamentals

From packets to practical troubleshooting — lab-safe.

Six modules covering network basics, OSI/TCP-IP, IP addressing, core protocols, practical diagnostics, and security applications. Browser simulations only — no unauthorized scanning.

Level
Beginner
Duration
6–8 weeks
Modules
6 modules · 32 lessons
Learning method
Lessons + labs
Preview first lesson

What you will learn

  • Explain LAN/WAN roles, topologies, and common devices
  • Use OSI/TCP-IP as a troubleshooting lens
  • Read CIDR, private addressing, and NAT at a practical level
  • Map DNS/DHCP/ARP/HTTP/SSH and diagnose with ping/traceroute concepts
  • Apply basic firewall and segmentation thinking

Course curriculum

Expand each module for lessons, progress, and labs assigned to that module — not a flat topic dump.

Module 1

Network Basics

What networks are, scope types, architectures, topologies, devices.

0/6 lessons

Lessons

  • 1. What is a Computer Network?preview~22 min
  • 2. LAN, WAN, MAN and PAN~20 min
  • 3. Client-Server Architecture~20 min
  • 4. Peer-to-Peer Architecture~20 min
  • 5. Network Topologies~20 min
  • 6. Network Devices~20 min

Module labs

Enrol to unlock full lessons and track module progress.

Module 2

OSI & TCP/IP

Layers, encapsulation, TCP vs UDP, ports and protocols.

0/6 lessons

Lessons

  • 1. Seven OSI Layers~22 min
  • 2. TCP/IP Model~20 min
  • 3. Encapsulation and Decapsulation~20 min
  • 4. TCP vs UDP and Common Ports~22 min
  • 5. Ports and Protocols~20 min
  • 6. Common Protocol Analysis~20 min

Module labs

Enrol to unlock full lessons and track module progress.

Module 3

IP Addressing

IPv4/IPv6, public/private, subnetting, CIDR, gateway, NAT/PAT.

0/5 lessons

Lessons

  • 1. IPv4, IPv6 and Subnetting~22 min
  • 2. Public vs Private IP~20 min
  • 3. CIDR Notation~20 min
  • 4. Default Gateway~20 min
  • 5. NAT and PAT~22 min

Module labs

Enrol to unlock full lessons and track module progress.

Module 4

Network Protocols

HTTP(S), DNS, DHCP, ARP, ICMP, SSH/FTP/SMTP, SMB/RDP.

0/4 lessons

Lessons

  • 1. HTTP, HTTPS, DNS and DHCP~22 min
  • 2. ARP~22 min
  • 3. ICMP~22 min
  • 4. SSH, FTP, SMTP, SMB and RDP~22 min

Module labs

Enrol to unlock full lessons and track module progress.

Module 5

Practical Networking

IP config, ping/traceroute, DNS lookup, ports, capture, inspection.

0/5 lessons

Lessons

  • 1. IP Configuration and Troubleshooting~22 min
  • 2. Ping and Traceroute~20 min
  • 3. DNS Lookup~20 min
  • 4. Port Identification~20 min
  • 5. Packet Capture and Traffic Inspection~22 min

Module labs

Enrol to unlock full lessons and track module progress.

Module 6

Security Applications

Recon, open ports, firewalls, anomalies, segmentation, detection.

0/6 lessons

Lessons

  • 1. Network Reconnaissance and Threats~22 min
  • 2. Open Port Identification~20 min
  • 3. Firewall Behavior~22 min
  • 4. Traffic Anomalies~20 min
  • 5. Network Segmentation~22 min
  • 6. Basic Network Attack Detection~22 min

Module labs

Enrol to unlock full lessons and track module progress.

OSINT in this course

Open-source intelligence is taught here — not only under Resources. Use authorized, public sources; no doxing or harassment; document sources and timestamps.

Full OSINT center → · Investigation playbook

Inside this course

Labs · Quizzes · Certificate

Labs below are curated for this syllabus (shared engine, course-specific assignments). They unlock with enrol; quizzes match course topics; finish ≈90%+ to claim a CYNARKS Academy certificate.

Course labs

10 assigned labs · free with this course enrol

+2 more assigned

Track quiz

308 questions matched to this course topics

Knowledge checks for this track only — not a separate global quiz menu.

Start track quiz

CYNARKS certificate

Educational completion certificate · verify by ID

Your progress: 0% · enrol to unlock claim

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