🌐 Advanced Networking
“Good network = Planning + Security + Scalability”
🟦 Module A – Lesson-4
🎯 Lesson Goal
- Professional network design karna
- Managed switch, VLAN samajhna
- Mikrotik / Ubiquiti level ka concept clear karna
- Government / Office projects ke liye ready hona
🔹 Part-1: Switch Types
🟢 Unmanaged Switch
- Plug & Play
- Small shop / home
- No control
🔵 Managed Switch
- VLAN
- Port security
- Monitoring
- Government & office use
📌 Rule:
Govt projects = Always Managed Switch
🔹 Part-2: VLAN (sbse Important Concept)
VLAN kya hai?
- ek hi switch me alag-alag virtual networks
Real Example:
| VLAN | Use |
|---|---|
| VLAN 10 | Office Computers |
| VLAN 20 | CCTV |
| VLAN 30 | Guest Wi-Fi |
📌 Benefit:
- Security
- Network slow nhi hona
- CCTV traffic alag rhega
🔹 Part-3: VLAN Practical (Conceptual Lab)
Example IP Plan
VLAN 10 → 192.168.10.0/24
VLAN 20 → 192.168.20.0/24
VLAN 30 → 192.168.30.0/24
Flow
Internet
↓
Router
↓ (Trunk)
Managed Switch
↓ ↓
PCs CCTV
📌 Interview Line:
“We segregate traffic using VLAN for performance & security”
🔹 Part-4: Mikrotik Router Basics (Field Level)
Why Mikrotik?
- Cheap
- Powerful
- Govt & ISP favorite
Basic Concepts
- Interfaces
- Bridge
- IP Address
- DHCP Server
- Firewall (basic)
📌 Real Use:
- Bandwidth control
- User management
🔹 Part-5: Ubiquiti / Enterprise Wi-Fi
Problem with normal routers
- 10–15 users max
- Drop issue
Enterprise Wi-Fi
- Multiple Access Points
- Central controller
- Seamless roaming
📌 Use Case
- Schools
- Hospitals
- Offices
🔹 Part-6: Office Wi-Fi Design (Very Important)
Example: 100 Users Office
- 1 Gateway Router
- 2–3 Access Points
- Channel planning
- VLAN per SSID
📌 Golden Rule
Wi-Fi ≠ Internet speed
Wi-Fi = Signal + Planning
🔹 Part-7: Network Security Basics
Must Do
- Change default passwords
- Disable unused ports
- Guest network separate
- Firewall rules
📌 Govt Audit Point
“CCTV network must be isolated”
🧪 Practical Assignment
✅ Task-1:
- Managed vs Unmanaged switch difference likho
✅ Task-2:
- VLAN diagram draw karo (Office + CCTV)
✅ Task-3:
- Mikrotik features list banow
📋 Lesson-4 Pass Checklist
✔ VLAN concept clear
✔ Office network design samjha
✔ Enterprise Wi-Fi idea aya
🧠 Pro Technician Line
“Good network = Planning + Security + Scalability”
hi