Review, Research, and Discussion

1- Why is access control important ?

Access controls limit access to information and information processing systems. When implemented effectively, they mitigate the risk of information being accessed without the appropriate authorisation, unlawfully and the risk of a data breach. They apply anywhere access is required to perform a business activity and should be adhered to when accessing information in any format, on any device.

2- Describe an application that would need access control ?

• Login credentials (such as usernames and passwords).

• PINs and one-time passwords (OTPs).

• Virtual private network (VPN) access to internal networks.

• Physical access cards, FOBs, tokens, locks, and keys.

• Security guards with access lists.

3- What is a role used for ?

Roles help you grant and manage sets of privileges for various categories of users.

Term	Discripe
Authorization	Authorization is the process of giving someone permission to do or have something. In multi-user computer systems,
Role Based Access Control	is an approach to restricting system access to authorized users.
Capabilities	is the thing that the user is apple to do .

Event-Driven Programming

Event-Driven Programming is a logical pattern that we can choose to confine our programming within to avoid issues of complexity and collision

EventEmitter

Node.js natively provides us with a useful module called EventEmitter that allows us to get started incorporating Event-Driven Programming in our project right away.

Removing Listeners

To remove event listeners in EventEmitter we can use the removeListener or removeAllListeners method. It’s important to note that in the EventEmitter that comes built-in with Node you must pass a reference to the exact function you wish to remove when using the removeListener method.