Different between rest api and restful api?

REST API is a method of programming that allows you to communicate with a microservice quickly and efficiently. The most important thing about it is that the communication between the client and server is made through HTTP. A REST API is a software design pattern used to create an application that interacts with a server-side web service through HTTP requests and responses.

A RESTful API is an Application Programming Interface (API) that uses the Representational State Transfer (REST) architectural style for its implementation. A RESTful API is a set of methods, status codes and content types used to interact with resources (data) on the Internet via HTTP or other protocols.

REST is the set of constraints. RESTful refers to an API adhering to those constraints. It can be used in web services, applications, and software.

https://blog.ndepend.com/rest-vs-restful/

Key Differences between REST vs RESTful API 

REST vs RESTful: Architecture

Though the architecture of both REST and RESTful API is similar, they vary with a slight difference. The REST API follows all the rules of the REST Architecture. It has a client-server, stateless, cacheable, layer system with a uniform interface, whereas the RESTful web applications have all the features of the REST architecture with unique additional features. The REST API has a separate system to handle application information.

REST vs RESTful: Cache Ability

The REST API exhibits cache ability as cacheable and not cacheable. This provides the clients and infrastructure an opportunity to store when it is possible. This is to increase the performance of the system. Whenever the client fails to use stored data, the not cacheable data gets displaced. In RESTful API, the constant state and cacheable information can be accessed by clients anytime anywhere.

REST vs RESTful: Stability

In REST API, the client has to manage all the application stages because the REST server does not maintain any kind of client state. You need to provide all the necessary data to process the request REST API. When there is any change in the RESTful APIs, it is essential for the client to revert back to the storage system. The exchange of data and states between the client and server establishes the stability of the REST systems. In RESTful services, the data implementation is hidden while the other data is not concealed.

REST vs RESTful: Multi-Layered Architecture

The constraint in REST, that the system’s devices are not able to view beyond the layer. This is overcome by combining the load balancers and some proxy to elevate the performance and security of the system. In the case of RESTful API, the boundaries are strong the separation between them is clear. This is because the layered architecture built over the client server has stateless limits. The data flow across the boundaries is managed by the client based on their requirement. It is the responsibility of the client to either display or manipulates the data.

REST vs RESTful: Undeviating Interface

It is a very crucial requirement to have an undefeated interface. This undeviated interface between systems present in REST architecture acts as a unique feature to segregate REST architecture from other independent panache. Both REST services handle data as a resource with a unique and individual namespace.

REST vs RESTful: Remote Procedure Call on Web Services

When the service is not in REST, it automatically searches for URI working or HTTP verb services. This is called the uniform set of resources and denotes the structural representation of the REST data. This separation between every layer is known as REST. These are also known as remote procedure calls. The query on HTTP POST and HTTP GET with a URL link is used to post a file and also configure its content. REST RESTful APIs use services like PUT, DELETE, GET, POST, and PATCH to perform the HTTP actions.

REST:

1.Rest(Representational State Transfer)is a style of software architecture.
2.The Rest Service is simple to use it HTTP protocol for all opeartions.
3.Its lightweight and faster(it use the.JSON and .XML formats).

RESTFULL:

1.RestFULL(Representational State Transfer)is a style of software architecture.
2.It uses the Complex Mechanisim like SOAP for Communication.
3.WCF service will allows to make calls and exchange the data using SOAP protocol over different protocols (HTTP, TCP, MSMQ etc..).