'<span>All methods should be declared private</span>' is not true for classes. One should be able to change the properties of objects, and to do this safely and in a controlled manner, some public methods are declared. Some private methods can also be declared for more potentially sensitive operations for being called from within the class.
There are various connectivity technologies that we use to connect. They are Ethernet, Internet (Wireless Connection), Bluetooth, Wi-Fi and Cellular.
Explanation:
- Ethernet is the direct connection among the devices that are located close to each other in a building. This is used for small scale enterprises.
- Wi-Fi lets wireless connections among multiple devices without any physical connection. And it is most extensively used in most of the corporate companies.
- Bluetooth is used to transfer the data from one device to the other when they are near.
- Cellular is used to connect people across the globe. And it is used widely in every enterprises.
