👋 Hello & Welcome! I'm an aspiring Network Security Engineer documenting my entire journey from beginner to professional. No gatekeeping, just learning in public. My mission is to achieve mastery in network and security fundamentals, integrate automation principles into daily

Network engineers sometimes lose sight of the real goal: serving the business. Technical perfection is useless if it doesn't help the bottom line. Focus on solutions, not arguments. #NetworkEngineering #BusinessValue

Networking devices aren’t confusing. They’re just doing different jobs 👇 🔊 Hub → sends to everyone 🎯 Switch → sends to the right device 🌍 Router → connects networks 🧩 Bridge → joins networks 🛡 Firewall → allows or blocks Basics first. Always. 🚀 Do follow for more

If this helped you 🫶 🔁 Retweet to help other beginners ❤️ Like to save it 📌 Bookmark for later More networking threads coming as I learn 🚀 Do follow for more such interesting concepts😃

1️⃣2️⃣ Rebooting the device 🔄 🔹 reload → Restart router/switch (⚠️ Make sure you saved configs!)

1️⃣1️⃣ Clearing mistakes ❌ 🔹 no ip address → Removes IP address 🔹 no shutdown / shutdown → Enable / Disable interface In Cisco IOS: 👉 no = undo

🔟 Console & VTY access 👤 🔹 line console 0 → Console access 🔹 password cisco 🔹 login 🔹 line vty 0 4 → Remote access (Telnet/SSH)

9️⃣ Basic security 🔐 🔹 enable password cisco → Simple password (not secure) 🔹 enable secret cisco123 → Encrypted password ✅ (recommended)

8️⃣ Hostname & banners 🏷️ 🔹 hostname Router1 → Rename your device 🔹 banner motd #Authorized users only# → Warning message on login 🚨

7️⃣ Checking interface status 🔍 🔹 show ip interface brief → One of the MOST used commands Shows: ✔ IP address ✔ Up/Down status ✔ Protocol status

6️⃣ Interface configuration 🌐 🔹 interface GigabitEthernet0/0 → Enter interface config mode 🔹 ip address 192.168.1.1 255.255.255.0 → Assign IP address 🔹 no shutdown → Turn the interface ON ✅ (Most beginners forget this! , including myself😅)

5️⃣ Saving your work 💾 (don’t skip this!) 🔹 copy running-config startup-config (or write memory) If you don’t save ❌ A reboot = all configs gone 😭

4️⃣ Basic but VERY important show commands 👀 🔹 show running-config → Current configuration (RAM) 🔹 show startup-config → Saved configuration (NVRAM) 🔹 show version → IOS version, uptime, hardware info

3️⃣ Help is your best friend 🤝 🔹 ? → Shows available commands 🔹 show ? → Shows all show options 🔹 tab → Auto-complete commands ✨ (No need to type everything!)

2️⃣ Configuration mode (where real work happens) 🔹 configure terminal (or conf t) → Enter global configuration mode 🔹 exit → Step back one level 🔹 end → Jump straight to privileged mode

1️⃣ First things first: Accessing the device 🔹 enable → Enter privileged mode (admin mode) 🔹 disable → Go back to user mode Think of it as: 👤 User → 👑 Admin

🧵 THREAD: @Cisco IOS Commands Every Beginner MUST Know 🚀 If you’re learning networking and Cisco feels scary 😰 This thread will make it click 💡 Save it. Bookmark it. Come back often. 👇

Explaining: The ranges of IP addresses 10.0.0.0 to 10.255.255.254, 172.16.0.0 to 172.31.255.254, and 192.168.0.0 to 192.168.255.254 are reserved for private use . Therefore, the IP address 13.16.123.1 is the only address in a public range. C. 13.16.123.1✅

🚨🤯 If the OSI model already explains networking… why does TCP/IP even exist? 📘 OSI Model ➜ Learning & troubleshooting 🧠 ➜ Conceptual framework 🌍 TCP/IP Model ➜ Real-world implementation ⚙️ ➜ Used by the Internet every day OSI = how networking is explained. TCP/IP =

🔐 Still leaving your Cisco router passwords exposed? 🚫 enable password → weak & visible ✅ enable secret → hashed & secure (ALWAYS use this) 🔒 service password-encryption → hides plain-text passwords Small commands. Big security difference. Do follow for more such

Not all network cables are created equal ⚡ • Twisted Pair → Flexible, affordable, LAN workhorse • Coaxial → Shielded, stable, legacy + ISP use • Optical Fiber → Light-speed, long distance, future-proof Choosing the right cable = better performance before any device is