Step 1: Detailed English Answer

Introduction:

Hello, I'm an experienced IT professional with a comprehensive understanding of computer networks and security. I am happy to assist you with your query on disabling the Internet on a computer.

Method 1: Disable Network Interface

* Windows:
* Open Control Panel > Network and Internet > Network and Sharing Center.
* Click on the Change adapter settings link on the left pane.
* Right-click on the network adapter you want to disable and select Disable.

* macOS:
* Click on the Apple menu > System Preferences > Network.
* Select the network interface you want to disable from the left pane.
* Click on the Disable button at the bottom of the window.

Method 2: Disable Network Card

* Windows:
* Open Device Manager by pressing Windows Key + X and selecting Device Manager from the menu.
* Expand the Network adapters section.
* Right-click on the network card you want to disable and select Disable device.

* macOS:
* Go to System Preferences > Network.
* Select the network interface you want to disable from the left pane.
* Uncheck the Enable checkbox at the bottom of the window.

**Method 3: Disable via Command Prompt (Windows)**

* Open Command Prompt as an administrator.
* Enter the following command to disable the network interface:

```
netsh interface set interface "[network adapter name]" disabled
```

* Replace [network adapter name] with the actual name of the network adapter you want to disable.

Method 4: Disable via Terminal (macOS)

* Open Terminal.
* Enter the following command to disable the network interface:

```
sudo ifconfig [network interface name] down
```

* Replace [network interface name] with the actual name of the network adapter you want to disable.

Additional Tips:

* If you want to disable the Internet temporarily, you can simply unplug the network cable or turn off the Wi-Fi adapter.
* Disabling the Internet will prevent the computer from accessing the Internet, but it will still be able to access local resources like shared files and printers.
* To re-enable the Internet, follow the same steps and select Enable instead of Disable.

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