Sep 01
c3725-...bin IOS image. → Copy to images dir → Decompress.c3725 → RAM: 256 MB.NM-1FE-TX (FastEthernet ports)NM-16ESW (switch module)WIC-2T (serial links).
Sep 01
Here’s a copyright-free and plagiarism-free version of Which Router to Use in GNS3:
When you start building labs in GNS3, one of the first choices you’ll face is which router type to use. Each option has different features, requirements, and performance considerations.
👉 In short:
Do you want me to also prepare this into a Word (.docx) file so you can use it directly as a guide?
Sep 01
Perfect 👍 I’ll rewrite that into a fresh, copyright-free and plagiarism-free version while keeping all the important details intact. You can safely post this on your FB/blog.
When working with GNS3, you’ll often hear about the GNS3 VM. Many beginners wonder: “Can’t I just install GNS3 on my computer without it?” The answer is yes — but using the official GNS3 VM makes everything run faster, smoother, and more compatible. Here’s why.
That’s where the GNS3 VM comes in.
The prebuilt VM from the GNS3 website is basically a ready-to-use Ubuntu server that comes with:
1. Performance Boost
2. Better Compatibility
3. Same Behavior Across Platforms
4. Extra Features
👉 Summary:
✅ That’s why most professionals and students rely on the official GNS3 VM — it gives you stability, speed, and compatibility for serious networking labs.
Do you want me to also make that comparison table (With vs Without GNS3 VM) so your readers instantly see the difference at a glance?
Sep 01
Perfect! Here’s a step-by-step guide to configure VirtualBox adapters for your GNS3 VM so everything communicates properly with your host and GNS3 GUI.
Step 1: Open VirtualBox Settings for GNS3 VM
Step 2: Configure Adapter 1 (Host-Only)
This is the key adapter — without it, GNS3 GUI cannot control VMs or routers.
Step 3: Configure Adapter 2 (NAT for Internet)
Optional: You can also configure a third adapter as Bridged if you want your labs to access your physical network.
Step 4: Boot the GNS3 VM
GNS3 VM is running
IP: 192.168.56.101
This IP is your Host-Only network IP (vboxnet0).
Step 5: Point GNS3 GUI to the VM
Step 6: Verify in GNS3
✅ Quick Tips
If you want, I can make a small visual diagram showing Adapter 1 (Host-Only) and Adapter 2 (NAT) and how traffic flows so it’s easier to remember.
Do you want me to make that diagram?
Ref: Internet/AI Tools/OpenAI/ChatGPT and Similar
Copyright and plagiarism free version.
Sep 01
Perfect 👍 Here’s a copyright-free infographic style summary of how to import GNS3 VM into VirtualBox — short, clean, and ready for FB/blog use: (ChatGpt)
Similar steps worked for me.
📥 1. Download
.ova file) from the official GNS3 website.📂 2. Import into VirtualBox
.ova file → click Import.⚙️ 3. Adjust Settings
▶️ 4. Start the VM
🔗 5. Connect GNS3 App
✅ Done!
Your GNS3 is now powered by VirtualBox VM.
Here’s a copyright-free, step-by-step guide you can post on your blog or FB:
GNS3 uses its own virtual machine (GNS3 VM) to run modern devices and appliances. If you are using VirtualBox instead of VMware, you need to import the GNS3 VM into VirtualBox first.
.ova file)..ova file you downloaded.Now, the GNS3 VM is linked to VirtualBox, and you can run routers, switches, and appliances through it.
⚡Tip: Always keep your GNS3 version and GNS3 VM version the same (e.g., GNS3 2.2.x works with GNS3 VM 2.2.x).
Ref: ChatGPT/Internet/AI Toolss
Aug 30
IPV4 Address: 32-bit
192.168.2.34–
IPv6 address : 128 bit : 8 groups of 4 hex digits
3ffe:1900:fe21:4545:0000:0000:0000:0000—
IPV6 Format (From AI Tools/OpenAI/ChatGPT)
ifconfig command output: to know your network interface configurations.
ifconfig
Explain the output of the Linux Command (From AI Tools/OpenAI/ChatGPT/Interney)
ifconfig
instead of ifconfig you can use ip address show command
command: ip address show
Output as follows:
Explain the output of ip address show
Find device and link information using the ip command: ip link show
The connection of a network interface to another device is called a link
Output of ip link show
To get Device statistics: ip -s link show
Output as follows:
Ip Address : Assign, See, and Delete
ip address add 192.168.2.22/24 brd + dev ens18
ip address show dev ens18
ip address del 192.168.2.22 dev ens18
ip link set eth0 up
ip link set eth0 down
SHOW Routing Table:
ip route show
ip route list dev ens18
Routing Commands: Modifications
ip route add <network/mask> via <gateway_IP>
ip route add 192.168.1.1/24 via 10.0.2.10
ip route add default via <gateway_IP>
ip route add default via 10.0.2.11
ip route add <NETWORK/MASK> dev <DEVICE>
ip route add 192.168.254.1/24 dev ens33
Others:
ip route delete …
ip route change …
ip route flush ..
ip route flush table
Know about Netplan:
Path: /etc/netplan
/etc/netplan/*.yaml are some important configuration files.
Netplan commands:
netplan apply
netplan generate
netplan try
ping command:
ping hostname
ping ip_address
Example:
host command:
Finds IP from host name
Example:
dig command:
Also, to find the IP address from the name.
dig www.google.ca
Example Output:
nslookup
Also, to find the IP address from the name.
nslookup www.google.ca
Example:
nslookup www.google.ca
Aug 28
Ref: Internet
How to Query to Database:
You can read the steps from:
— https://www.geeksforgeeks.org/java/establishing-jdbc-connection-in-java/
Connect to SQL Server
Aug 28
Abstract Factory Pattern Example in Java
From: AI Tools/OpenAI/Chatgpt
“
Perfect 👍 Let me give you a clean, copyright-free Abstract Factory Pattern Java example with explanation.
We want to create UI components (Button, Checkbox) for different operating systems (Windows and Mac). The client should be able to request them without worrying about which OS family is used.
// Product A
interface Button {
void paint();
}
// Product B
interface Checkbox {
void check();
}
// Windows Variants
class WindowsButton implements Button {
public void paint() {
System.out.println("Rendering a Windows style Button");
}
}
class WindowsCheckbox implements Checkbox {
public void check() {
System.out.println("Checking a Windows style Checkbox");
}
}
// Mac Variants
class MacButton implements Button {
public void paint() {
System.out.println("Rendering a Mac style Button");
}
}
class MacCheckbox implements Checkbox {
public void check() {
System.out.println("Checking a Mac style Checkbox");
}
}
interface GUIFactory {
Button createButton();
Checkbox createCheckbox();
}
class WindowsFactory implements GUIFactory {
public Button createButton() {
return new WindowsButton();
}
public Checkbox createCheckbox() {
return new WindowsCheckbox();
}
}
class MacFactory implements GUIFactory {
public Button createButton() {
return new MacButton();
}
public Checkbox createCheckbox() {
return new MacCheckbox();
}
}
public class AbstractFactoryDemo {
public static void main(String[] args) {
// Choose factory based on OS
GUIFactory factory;
String os = "Windows"; // could be detected dynamically
if (os.equals("Windows")) {
factory = new WindowsFactory();
} else {
factory = new MacFactory();
}
// Use factory to create related objects
Button button = factory.createButton();
Checkbox checkbox = factory.createCheckbox();
// Work with products
button.paint();
checkbox.check();
}
}
Rendering a Windows style Button
Checking a Windows style Checkbox
Rendering a Mac style Button
Checking a Mac style Checkbox
GUIFactory) ensures we can switch between families of products easily.WindowsButton or MacButton; it just asks the factory.👉 Would you like me to also prepare a simpler “real-life” Abstract Factory example (like 🍕 fast-food meal combos) so you can post something more fun and less technical on your blog?
“
Aug 28
From AI Tools/Open AI/ChatGPT
“
Perfect 👍 Here’s a copyright-free comparison table of the Builder Pattern vs Factory Pattern in Java, styled for easy posting on Facebook/Blog:
| Aspect | Builder Pattern | Factory Pattern |
|---|---|---|
| Type | Creational design pattern | Creational design pattern |
| Purpose | To construct complex objects step by step with fine-grained control. | To create objects without exposing the creation logic to the client. |
| When to Use | When an object requires many optional parameters or a complex construction process. | When you want to create objects from a family of related classes without specifying the exact class. |
| Object Creation | Involves a director (optional) and builder that gradually assemble the object. | Uses a factory method or class to decide which subclass to instantiate. |
| Flexibility | Gives precise control over how the object is built. | Simplifies object creation and centralizes it. |
| Client’s Role | Client calls builder methods (or uses chaining) to set properties and finally build the object. | Client only requests an object type, factory decides the exact class to return. |
| Example Use Cases | Creating a User object with optional fields (address, phone, etc.), building a complex configuration. | Creating shapes (Circle, Square, Rectangle), creating database connections, parsers. |
| Advantages | – Handles complex construction. – Improves code readability with method chaining. – Avoids telescoping constructors. | – Hides object creation logic. – Promotes loose coupling. – Easier to extend with new object types. |
| Disadvantages | More code to set up (requires builder classes). | Can create too many factory classes if overused. |
✅ Quick Summary:
👉 Would you like me to also prepare a real-world analogy (like food ordering 🍔 for Builder, and coffee shop ☕ for Factory) so your readers instantly understand the difference?
“
Aug 28
Observe the code below:
ShapeFactory factory = new ShapeFactory();
Shape shape1 = factory.getShape("circle");
Shape shape2 = factory.getShape("square");
Shape shape3 = factory.getShape("rectangle");
shape1.draw();
shape2.draw();
shape3.draw();We wanted to create objects such as shape1, shape2, and shape 3. We did not directly (create and) call the class for the required objects. We did not create or call a circle class, or a square class, or a rectangle class. We rather thought there was a factory class that could create objects based on our requirements. We asked the factory to create a circle object, then it gave us a circle object. In the same way, we asked for square and rectangle objects from the factory class, and the class returned us square and rectangular objects.
This is about: Factory Design Pattern: Examples are in Java
From AI Tools/OpenAI/Internet
“
Perfect 👍 — here’s a copyright-free write-up of the Factory Pattern in Java that matches the same style as the Builder Pattern post, so you can share both on Facebook or your blog.
The Factory Pattern is a creational design pattern that provides a way to create objects without exposing the creation logic to the client. Instead of directly calling a constructor, you use a factory method that decides which object to return.
You should use the Factory Pattern when:
✔️ Encapsulation of object creation logic.
✔️ Makes code easier to extend when adding new object types.
✔️ Promotes loose coupling (client depends on interface, not implementation).
✔️ Simplifies maintenance and testing.
✔️ Encourages code reuse.
// Product Interface
interface Shape {
void draw();
}
// Concrete Products
class Circle implements Shape {
public void draw() {
System.out.println("Drawing a Circle.");
}
}
class Square implements Shape {
public void draw() {
System.out.println("Drawing a Square.");
}
}
class Rectangle implements Shape {
public void draw() {
System.out.println("Drawing a Rectangle.");
}
}
// Factory Class
class ShapeFactory {
public Shape getShape(String shapeType) {
if (shapeType == null) return null;
switch (shapeType.toLowerCase()) {
case "circle": return new Circle();
case "square": return new Square();
case "rectangle": return new Rectangle();
default: return null;
}
}
}
// Usage
public class FactoryPatternExample {
public static void main(String[] args) {
ShapeFactory factory = new ShapeFactory();
Shape shape1 = factory.getShape("circle");
Shape shape2 = factory.getShape("square");
Shape shape3 = factory.getShape("rectangle");
shape1.draw();
shape2.draw();
shape3.draw();
}
}
✅ Output:
Drawing a Circle.
Drawing a Square.
Drawing a Rectangle.
📌 In short:
The Factory Pattern lets you create objects without knowing their exact class. It simplifies code, promotes loose coupling, and makes it easier to manage different object types from a single point.
👉 Now that we have both Builder and Factory, would you like me to also prepare a comparison table (Builder vs Factory) in the same copyright-free format for FB/Blog? That way your readers can instantly see the differences.
“
