What is Cloud Computing ?
Cloud computing provides a simple way to access servers, storage, databases and a broad set of application services over the Internet. Most of the companies moving to cloud to host applications and resources. That's why there are job opportunity as a cloud admin and solution architect. You can provision exactly the right type and size of computing resources you need to power your newest bright idea or operate your IT department. Amazon AWS, Microsoft Azure, and Google Cloud are leading cloud plateforms.
An organization can work without network device (Switches, Routers, Access Points, firewalls, etc..) . either it is a small company or larger organization. Network devices play important role, when we connect the computers within location or to connect multiple sites. There are many manufectures for network device (Such as Cisco, Juniper, D-link, etc..) but Cisco is most polular for network certification training. Cisco certificatrions are divided into four levels (Associate -> Professinal -> Expert -> Speciality )
Server are very important for any organization because they provides centralized management for a network (Eg:- Active directory, Email server, File server, Application server, Web server, etc...). These all services require an operating system, Microsoft Windows and Linux are example of operating systems