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15/06/2026
🚀 TCP vs UDP
⚡ TCP 🔗
Connection oriented
Reliable delivery
Error checking
Ordered packets
Slower
⚡ UDP ⚡
Connectionless
No guarantee delivery
No ordering
Faster
Low overhead
⚡ Use Cases 📊
TCP web email file transfer
UDP streaming gaming voice
TCP ensures accuracy, UDP ensures speed based on application needs.
15/06/2026
🚀 BGP Multi Homing
⚡ Multi Homing 🌐
One network connects to multiple ISPs
⚡ Redundancy 🔁
If one link fails, traffic uses another
⚡ Load Sharing ⚡
Traffic can be balanced across links
⚡ BGP Routing 📡
Selects best path using attributes
⚡ AS Number 🧩
Required for BGP configuration
⚡ Policy Control 🔐
Control inbound and outbound traffic
BGP multi homing improves availability, reliability, and control in enterprise networks.
10/06/2026
🚀 Video Management System
⚡ VMS 🎥
⚡ CCTV Cameras 📹
⚡ NVR DVR 💾
⚡ Live Monitoring 🖥
⚡ Recording Playback 🔁
⚡ Remote Access 🌐
⚡ User Control 🔐
Video Management System controls, records, and monitors CCTV cameras from a central platform.
09/06/2026
🚀 OSI Reference Model
⚡ Application Layer 📡
⚡ Presentation Layer 🎯
⚡ Session Layer 🔗
⚡ Transport Layer 📦
⚡ Network Layer 🌐
⚡ Data Link Layer 🔀
⚡ Physical Layer 🔌
OSI model defines how data moves across a network in 7 layers from user application to physical transmission.
09/06/2026
🚀 OSPF Quick Review
⚡ OSPF 🔀
Link state routing protocol
⚡ Areas 🌐
Area 0 backbone required
⚡ Metric 📊
Uses cost based on bandwidth
⚡ DR BDR 📡
Elected in multi access networks
⚡ Fast Convergence ⚡
Quick route updates
⚡ LSAs 📄
Exchange routing information
OSPF provides fast, scalable, and efficient routing in modern networks.
🚀 CCNA Commands
⚡ show running config 📄
⚡ show ip interface brief 🌐
⚡ show ip route 🔁
⚡ show vlan brief 🧩
⚡ show mac address table 📊
⚡ configure terminal ⚙
⚡ interface g0 0 🔌
⚡ ip address 📡
⚡ no shutdown 🔓
⚡ copy running config startup config 💾
CCNA commands help you configure, verify, and troubleshoot Cisco devices in real networks.
08/06/2026
🚀 IP Address vs MAC Address vs Subnet Mask
⚡ IP Address 🌐
Logical address
Used for communication between networks
Example 192.168.1.1
⚡ MAC Address 🔗
Physical address
Unique to each device
Example 00:1A:2B:3C:4D:5E
⚡ Subnet Mask 📊
Defines network and host portion
Used to divide networks
Example 255.255.255.0
IP identifies device on network, MAC identifies device hardware, subnet mask defines network boundaries.
08/06/2026
🚀 Half Duplex vs Full Duplex
⚡ Half Duplex 🔁
Data flows in one direction at a time
Example Walkie Talkie
⚡ Full Duplex 🔀
Data flows in both directions at the same time
Example Phone Call
⚡ Key Difference 📊
Half duplex is slower
Full duplex is faster and more efficient
Duplex mode defines how devices send and receive data in a network.
08/06/2026
🚀 What is BGP
⚡ BGP 🌍
⚡ Path Vector Protocol 🔗
⚡ Internet Routing 🌐
⚡ AS Number 🔢
⚡ Best Path Selection 📊
BGP is a routing protocol used to exchange routes between different networks on the internet using autonomous systems.
08/06/2026
🚀 Network Fundamentals
⚡ IP Address 🌐
⚡ Subnetting 📊
⚡ VLAN 🧩
⚡ Routing 🔁
⚡ Switching 🔀
⚡ DNS 🌍
⚡ DHCP 📡
⚡ NAT 🔄
⚡ Firewall 🔐
Network fundamentals define how devices connect, communicate, and exchange data across networks.