Independence work 2 (Jami 20 ball ) I. Speaking topics: Prepare ppt presentations on the given topics and speak about them

IV. NETWORKS
Task 1. Read the text “What is a network?” and answer to the questions.
A network is how one can link two or more computers together to share resources, files, or even an internet connection. Most homes and workplaces have networks set up to connect their computers somehow, but four key types of networks are available to users. 
What Is the Definition of a Network?
A network can have a pretty broad definition. At its simplest, it always involves two or more computers being linked either physically with cables or via a Wi-Fi connection. By being linked, these computers can share their resources, files, or internet connection without manually connecting on each occasion. 
Where networks can get much more complex is when it comes to size. A family home might, for instance, have a network consisting of two home computers and a Wi-Fi connection (which the family uses for various additional devices such as a smart TV, streaming box, smartphones, etc.). However, an office building may have an extensive network with thousands of computers connected to it physically with Ethernet cables. Some networks can even expand to cover large geographic areas. 
There are also four main types of networks, and it's essential to know the difference between them.
What Are the Four Types of Network? 
The most common types of networks include Local Area Network (LAN) and Wide Area Network (WAN). The other two main types of network are Metropolitan Area Network (MAN) and Wireless LAN (WLAN), with Wireless WAN (WWAN) also an offshoot of a similar principle. Here's a brief breakdown of each of the four main types of network.
Local Area Network.
Typically the most common type of network you'll encounter, a Local Area Network, involves connecting computers in a relatively small area. That area can be your home, an office, or school, amongst other locations. The devices can connect either via an Ethernet cable or through Wi-Fi. 
W ide Area Network.
This type of network spans a large geographic area such as a city, state, or country. The internet itself is considered the largest Wide Area Network globally, with Wide Area Networks making it possible for smaller Local Area Networks to connect to it. Businesses may also have a Wide Area Network to link their many offices together.

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  Metropolitan Area Network. A Metropolitan Area Network is bigger than a LAN but smaller than a WAN. Large corporations or government bodies use it to link together different resources across a business. 
  
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  Wireless LAN.
  

A wireless LAN works much like a Local Area Network, but it does so through wireless connections such as Wi-Fi or Bluetooth rather than using Ethernet cables.