Cyber-notes with Nommy #1425
Description
🚀 Cyber Security Roadmap 2025 – From Beginner to Expert!
Ready to start your journey into the world of ethical hacking, networking, and defense?
I’m launching a complete playlist series that takes you step-by-step:
Phase 1: Basic Fundamentals (Systems, Networking, Commands, Tools)
Phase 2: Networking, Pentesting & Defense (Labs, Attacks, Protection)
Phase 3: Specialization (Red Team, Blue Team, Cloud & App Security)
🎯 Whether you’re starting from zero or aiming to go pro — this roadmap will build your skills the right way, one phase at a time.
Follow the series to learn, practice, and grow into a Cybersecurity Expert in 2025.
❓ What is LAN, MAN, and WAN?
📡 LAN (Local Area Network):
Connects computers within a small area like a home, school, or office.
💡 Example: Your home Wi-Fi network.
🏙️ MAN (Metropolitan Area Network):
Covers a larger area such as a city or university campus.
💡 Example: A city-wide network linking multiple college branches.
🌍 WAN (Wide Area Network):
Connects devices across countries or continents.
💡 Example: The Internet itself!
❓ What is an IP Address & What’s the Difference Between IPv4 and IPv6? 🌐
💻 IP (Internet Protocol) Address
Every device connected to the internet or a network has a unique number called an IP address.
It works like your digital home address — helping data packets know where to go and where to come from.
📍 IPv4 (Internet Protocol version 4):
🔸 Uses a 32-bit system (like 192.168.1.1).
🔸 Provides around 4.3 billion unique addresses.
🔸 Still widely used, but running out of available addresses.
🔸 Example: Most Wi-Fi networks, modems, and routers still rely on IPv4.
🚀 IPv6 (Internet Protocol version 6):
🔹 Uses a 128-bit system (like 2001:0db8:85a3::8a2e:0370:7334).
🔹 Supports 340 undecillion unique addresses (that’s 340 with 36 zeros!).
🔹 Offers faster data transfer, better security, and automatic configuration.
🔹 Built for the future internet — smart devices, IoT, and global connectivity.
❓ What Are the Types of IP Addresses? 🌐
Every device connected to a network has an IP address, but not all are the same. Let’s understand the main types 👇
🔹 1. Private IP Address
Used inside a local network (like your home or office).
💡 Example: 192.168.1.5
➡️ Not visible on the internet. Used for communication between internal devices (PC, mobile, printer).
🔹 2. Public IP Address
Assigned by your Internet Service Provider (ISP) and used to connect to the internet.
💡 Example: 103.25.56.9
➡️ Identifies your network globally.
🔹 3. Static IP Address
Fixed IP that doesn’t change.
💡 Used by: Servers, websites, CCTV systems.
➡️ Reliable for hosting and remote access.
🔹 4. Dynamic IP Address
Assigned temporarily each time you connect to the internet.
💡 Used by: Most users’ home Wi-Fi.
➡️ Changes automatically and is managed by DHCP.