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Wi-Fi is used to establishs network in offices or within the small campus of an organisation. It establishes
a good network connectivity generally for locations within a distance of 100 m. It reduces the usage of
spaces and cables.
Notes
WiMAX stands for Worldwide Interoperability for Microwave Access. It is a type of telecommunication
facility that enables wireless transmission of data. It is specially used in places where
Internet connectivity is poor. A Local base station is created at such places where
WiMAX device is installed so that it catches signal, amplifies it and passes on to a local
network. Its range of operation is within 50 Km radius from base station.
Infrared
It is a networking medium in which computing devices are connected via short-range wireless signals
through infrared adapters. Infrared connections are commonly used in remote controls to operate TV, AC,
etc. that can connect by signal transmission in a short range distance.
CLOUD COMPUTING
Cloud computing refers to the usage of IT applications that are available on Cyber network but stored
in a remote server. Rather than keeping files on a hard drive or local storage device, cloud-based storage
makes it possible to save program or data on a remote storage media and can be accessed anywhere
using Internet connections.
It makes it easier for organisations to use the same software at different locations or branches as
the application package can be used by numerous users thereby saving cost of multiple numbers of
installations.
Computers connected to cloud computing technology are known as Cloud Computers. Cloud services
enable the users to use applications or remote servers. Thus it saves cost of purchasing additional software
licence. It also reduces data duplication of redundancy and removes data inconsistency or contradictions.
Cloud computing is also very helpful in transferring large files; e.g., E-mails have the limitation of sending
files up to 25MB in size only, but larger files can be sent through cloud storage options such as Google
Drive. Some of the types of clouds are:
l Public Cloud: It is available through Internet to anyone who is willing to pay for the services of
application. Some examples of public cloud computing are AWS, Microsoft Azure, etc.
l Private Cloud: It is generally an application that is developed and run by a particular organisation
for its own use at different branches or location. Some examples of private cloud computing are
Google drive, One Drive, IDrive, etc.
PROTOCOLS
Protocol refers to a set of common notions, norms or rules that coordinate or govern the functioning
between two or more sets of computers or networks.
Basics of Information Technology 43

