User: Explain in a simple language a concept of cumputer networks.
Assistant: Sure! A computer network is a group of computers and other devices that are connected together so they can communicate with each other. Think of it like a mailing system: just as you send letters or packages from one place to another, computers send information back and forth over the network.

Here are some basic parts of a computer network:

1. **Devices**: These are the computers, smartphones, tablets, or any other gadgets that connect to the network.

2. **Connection**: Devices connect to each other using cables (like Ethernet) or wirelessly (like Wi-Fi).

3. **Communication**: When devices are connected in a network, they can share information, such as files, documents, or even play games together.

4. **Internet**: The largest network in the world is the Internet, which connects millions of private, public, academic, business, and government networks, allowing people to access and share information globally.

5. **Router**: This is a special device that helps direct the data between different devices on the network and makes sure it gets to the right place.

In short, a computer network lets devices share information and resources with each other, making it easier for us to use technology together!
User: Explain the concept of network interface in simple language
Assistant: A network interface is like a door that lets your computer or device connect to a network. It’s the part that helps your device communicate with other devices over a network, whether that’s a wired connection (like a cable) or a wireless connection (like Wi-Fi).

Here are some key points about a network interface:

1. **Types**: There are different types of network interfaces. The most common ones are Ethernet interfaces (for wired connections) and Wi-Fi interfaces (for wireless connections). Each type helps your device get online or connect to other devices.

2. **Hardware**: A network interface is often a physical piece of hardware, like a network card inside your computer or a built-in Wi-Fi chip in your smartphone.

3. **Communication**: When your device wants to send or receive data (like browsing the internet or sharing files), the network interface is responsible for packaging that information and sending it through the network.

4. **Unique Address**: Each network interface has a unique address called a MAC address, which helps identify it on the network, just like a home address helps the mailman know where to deliver your mail.

In simple terms, a network interface is the component that allows your device to connect to a network and communicate with other devices, making it an essential part of how we use technology every day!
User: What is a bridge and what purpose it has?
Assistant: A bridge is a device used in computer networks to connect two or more separate networks and allow them to communicate with each other. Think of it like a bridge over a river that lets people cross from one side to the other. In networking, a bridge helps data flow between different network segments.

Here are some key points about a bridge:

1. **Connecting Networks**: A bridge connects two or more network segments, making them behave as a single network. This helps expand the network without having to use complex devices.

2. **Data Filtering**: Bridges can filter traffic. This means they can decide which data packets to pass along and which to drop, based on the destination address. This helps reduce unnecessary traffic and improves network performance.

3. **Learning**: Bridges can "learn" which devices are connected to each segment of the network. They create and maintain a table of device addresses, which helps them make better decisions on where to send data.

4. **Reducing Collisions**: By dividing a larger network into smaller segments, bridges can help reduce data collisions (when multiple devices try to send data at the same time) and improve overall network efficiency.

In simple terms, a bridge helps different parts of a network work together smoothly by connecting them and managing the data that flows between them.
User: Virtual machine installed in host usually has access to the network. Sometimes it acts as a separate host in the network, sometimes it is not. How it is achieved in terms of network organisation primitives  - bridges, interfaces, etc? 
Assistant: