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Li-Fi vs Wi-Fi: A Battle of Light and Waves

Li-Fi vs Wi-Fi: A Battle of Light and Waves Li-fi is a light fidelity device that supports only the infrared and other lighting systems to transfer the data to the device which is used to receive from the sender device. Wifi is a wireless fidelity device that supports the radio waves to transfer the data to the wifi device which is used to receive the wifi signals at the limited ranges due to the device version capacity. Introduction to the computer system and computer applications related topics are listed following below here: Li-Fi vs Wi-Fi: A Battle of Light and Waves Let’s discuss the computer system related topic and questions above listed and their answers are following below here: Li-Fi vs Wi-Fi: A Battle of Light and Waves There are some points on the computer system and data communication related to the topic of “Li-Fi vs Wi-Fi: A Battle of Light and Waves” following below here: Lifi based data communication system:- Li-Fi is a light based signal data transmission ...
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What is the role of the data model in database management system [DBMS]?

What is the role of the data model in database management system [DBMS]?

Role of the data model in DBMS

  • Data model is structure in a graphical form to represent the database look like in their structure.
  • Data model represents the organization structure in a graphical form where the database has so many relationships of the entity.
  • Entity is a group of data, where the data is in a relation to another data.
  • Entity is also called group of information, where the information is meaningful sentence in a description or character type data.
  • The component of entity such as name, gender, address etc. are called attributes of the entity.
  • You can connect the entity to entity with their properties if the properties of both entities are matched to each other.
entities of sales manager and sales employee with sales department


The image reference shows you the sales manager is connected to the sales employee with their property of the Sales Department. There are three entities in the structure or model of the database are Sales Manager and Sale employee are their attribute is Sales department.



Can entities have attributes to describe the information better in the data model?

Yes, the entities provides the person based or object information but their attributes are use to provide the information which is known as property of the entity on the Data model to describe better how the entity has so many properties and that can be more connected with the same attributes.
Entities describe the properties with weak attributes and strong attributes that describe more information about the entity.
Where the entity can be a person name or employees name and attributes are the ID numbers, contact number, email, job descriptions etc.
For example:- the user has a name of Raju entity stores the name Raju where the last name is an attribute which is Singh and
Attribute 2 = Id-2894 (primary key)
Attribute 3 = 99733xxxxx (contact number)
Attribute 4 = rajusingh32@mail.com (typical email address) etc. that are used on the attributes in the graphs or ER diagram of the entity relationship model or data model to better describe how they have properties.


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My latest post is here links below about the databases technology

What are the components of data model in [DBMS] Relational Database Management System?

There are five main components of data model... 👉 click here 👈

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