🚀 CYBERSECURITY COMPLETE ROADMAP (Beginner → Advanced) 📘 PHASE 1: Foundations (Month 1–2)

 

🚀 CYBERSECURITY COMPLETE ROADMAP (Beginner → Advanced)

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📘 PHASE 1: Foundations (Month 1–2)

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1️⃣ Networking Deep Dive (Core Backbone)

🔹 What You Must Understand

OSI Model (7 Layers)

Layers:

1. Physical

2. Data Link

3. Network

4. Transport

5. Session

6. Presentation

7. Application

👉 Real understanding:

• HTTP works at Application layer

• TCP works at Transport layer

• IP works at Network layer

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TCP vs UDP

TCP	UDP
Reliable	Fast
Connection oriented	Connectionless
Used in HTTPS	Used in streaming

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Important Concepts

• IP Address (IPv4, IPv6)

• Subnetting

• DNS (How google.com becomes IP)

• ARP

• Ports (80, 443, 22, 21, 3306)

• Three-way handshake (SYN → SYN-ACK → ACK)

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Tools Practice

• Wireshark → Capture packets

• ping, traceroute

• netstat

• nslookup

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2️⃣ Linux Mastery (Month 1–2)

Install:

• Kali Linux (VirtualBox)

Learn:

File Structure

• /etc

• /var

• /home

• /bin

• /root

Important Commands

ls
cd
chmod
chown
grep
cat
nano
find
ps
kill
apt install

Permissions

Example:

-rwxr-xr--

Meaning:

• Owner: read write execute

• Group: read execute

• Others: read

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3️⃣ Programming for Security

Since you're a developer, focus on:

Python

• Variables

• Loops

• Functions

• Requests library

• Sockets

Example:

import socket
print(socket.gethostbyname("google.com"))