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Adding a Network Adapter Through Oracle VM VirtualBox
Adding a network adapter in Oracle VM VirtualBox allows your virtual machine (VM) to communicate with other machines and the outside world. You can configure different types of network connections based on your needs, such as NAT, Bridged Adapter, or Host-Only Adapter. Here’s how to add and configure a network adapter for your VM.

Step-by-Step Guide
Open Oracle VM VirtualBox:

Launch the VirtualBox application on your host machine.
Select Your Virtual Machine:

In the VirtualBox Manager, find the VM to which you want to add a network adapter.
Click on the VM to select it.
Open Settings:

Click the Settings button (gear icon) in the toolbar or right-click the VM and select Settings.
Go to the Network Tab:

In the Settings window, click on the Network tab on the left side.
Add a Network Adapter:

You will see several adapter slots (Adapter 1, Adapter 2, etc.).
Check the box next to Enable Network Adapter for the adapter you wish to configure (e.g., Adapter 1).
Select the type of adapter from the Attached to dropdown menu:
NAT: Allows the VM to access external networks through the host.
Bridged Adapter: Connects the VM directly to the physical network, making it appear as a separate machine on the network.
Host-Only Adapter: Creates a network that allows communication between the host and the VM, but not with external networks.
Internal Network: Enables communication between VMs on the same internal network.
Configure Additional Settings (Optional):

Depending on your selection, you may see additional options:
Name: Choose the network interface on the host (for Bridged Adapter).
Cable Connected: Ensure this box is checked if you want the adapter to be active.
Save Changes:

Click OK to save your settings and close the dialog.
Start Your Virtual Machine:

Select your VM and click the Start button to boot it up. The new network adapter will be active.
Verify Network Connection:

Inside the VM, check the network settings to verify that the adapter is recognized and working.
You can use commands like ipconfig (Windows) or ifconfig/ip addr show (Linux) to see the assigned IP address.
Conclusion
Adding a network adapter in Oracle VM VirtualBox is a straightforward process that enhances your VM's connectivity options. By configuring the adapter type and settings, you can control how your virtual machine interacts with both the host and external networks, catering to various use cases such as testing, development, and networking simulations.