Jossylink Computer Network Technology

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Photos from Jossylink Computer Network Technology's post 26/05/2026

🌐 SUBNETTING MADE EASY πŸ’‘πŸ“‘

Many students fear subnetting in Networking πŸ˜…
But once you understand the basics, it becomes very easy! βœ…
πŸ“˜ What is Subnetting?
Subnetting is the process of dividing one large network into smaller networks called subnets.
🎯 Why Do We Use Subnetting? βœ… Reduces network traffic
βœ… Improves network speed
βœ… Enhances security
βœ… Makes IP management easier
βœ… Helps companies organize departments efficiently
🧠 EASY WAY TO UNDERSTAND SUBNETTING
Imagine a school with 500 students in one classroom 😳
Communication will be difficult and noisy.
Now divide them into smaller classrooms: βœ”οΈ Class A
βœ”οΈ Class B
βœ”οΈ Class C
Communication becomes faster and organized.
That’s exactly what subnetting does in networking! πŸ”₯
πŸ“Œ Example: IP Address: 192.168.1.0/24
A /24 network gives: ➑️ 256 total IP addresses ➑️ 254 usable hosts
If we subnet into /26: βœ… We get 4 smaller networks βœ… Each subnet has 64 IP addresses
πŸ“Š Simple Formula: Number of Hosts = 2^h - 2
Where: h = number of host bits
πŸš€ Subnetting is one of the most important skills in: πŸ’» CCNA πŸ” Cybersecurity ☁️ Cloud Computing πŸ–§ Network Engineering
Practice daily and subnetting will become your best friend 😎

24/05/2026

πŸ” STEP-BY-STEP GUIDE TO SECURE YOUR ACCESS POINT & WIRELESS ROUTER πŸ“ΆπŸ›‘οΈ

Hackers often target weak Wi-Fi networks. Follow these simple steps to protect your internet connection and devices. πŸ‘‡

βœ… 1. Change the Default Router Password
Most routers come with default usernames and passwords that hackers already know.
➑️ Create a strong admin password immediately.
βœ… 2. Rename Your Wi-Fi Network (SSID)
Avoid using names like β€œTP-Link” or β€œHuawei123”.
➑️ Use a unique network name that doesn’t reveal your identity or router brand.
βœ… 3. Enable WPA2 or WPA3 Security
Go to Wireless Security Settings.
➑️ Select WPA2-PSK or WPA3 encryption for stronger protection.
❌ Avoid WEP because it is outdated and easy to hack.

βœ… 4. Use a Strong Wi-Fi Password
Create a password with:
πŸ”Ή Uppercase letters
πŸ”Ή Lowercase letters
πŸ”Ή Numbers
πŸ”Ή Symbols
Example: T3ch@2026!WiFi
βœ… 5. Disable WPS (Wi-Fi Protected Setup)
WPS can make connecting easy, but attackers can exploit it.
➑️ Turn it OFF from router settings.
βœ… 6. Update Router Firmware
Manufacturers release updates to fix security vulnerabilities.
➑️ Regularly check for firmware updates.
βœ… 7. Enable MAC Address Filtering (Optional)
This allows only approved devices to connect to your Wi-Fi.
βœ… 8. Hide Your SSID (Optional)
This prevents your Wi-Fi name from appearing publicly.
➑️ Users must manually enter the network name to connect.
βœ… 9. Turn Off Remote Management
Disable remote access unless you truly need it.
➑️ This blocks outsiders from managing your router online.
βœ… 10. Restart & Monitor Connected Devices
Check devices connected to your network regularly.
🚨 Remove unknown devices immediately.

🎯 BONUS TIP:
Place your router in the center of your office/home to reduce signal leakage outside your building.
πŸ’‘ A secured wireless network protects your: βœ”οΈ Personal data
βœ”οΈ Smart devices
βœ”οΈ Business information
βœ”οΈ Internet speed
Follow for more Networking & Cybersecurity
tips πŸ”₯πŸ’»

23/05/2026

πŸ” 5 IPS & IDS Devices Every Cybersecurity Professional Should Know πŸ’»πŸ›‘οΈ

Cybersecurity is all about detecting and stopping threats before they cause damage. Two important security systems used in networks are:

βœ… IDS (Intrusion Detection System) – Detects suspicious activities and alerts administrators.
βœ… IPS (Intrusion Prevention System) – Detects and automatically blocks attacks in real time.

πŸ”₯ Here are 5 popular IPS/IDS devices and their functions:

1️⃣ Cisco Firepower
πŸ”Ή Provides advanced threat detection and intrusion prevention.
πŸ”Ή Helps block malware, ransomware, and suspicious traffic.

2️⃣ Snort IDS/IPS
πŸ”Ή Open-source security tool used for monitoring network traffic.
πŸ”Ή Detects attacks, scans, and unauthorized access attempts.

3️⃣ Palo Alto Networks PA-Series
πŸ”Ή Combines firewall protection with IPS features.
πŸ”Ή Prevents cyber attacks and controls malicious applications.

4️⃣ Suricata IDS/IPS
πŸ”Ή High-performance network threat detection tool.
πŸ”Ή Monitors traffic in real time and blocks dangerous activities.

5️⃣ Fortinet FortiGate
πŸ”Ή Offers firewall, IPS, and web filtering solutions.
πŸ”Ή Protects organizations from hackers and network intrusions.

πŸ’‘ Why are IPS & IDS important?
βœ”οΈ Detect cyber threats early
βœ”οΈ Prevent unauthorized access
βœ”οΈ Protect sensitive company data
βœ”οΈ Improve network security

πŸš€ Cybersecurity is one of the fastest-growing tech careers in 2026. Learning these tools can boost your networking and security skills!

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