Stateless rules engine – Inspects each packet in isolation, without regard to factors such as the direction of traffic, or whether the packet is part of an existing, approved connection. This engine prioritizes the speed of evaluation. It takes rules with standard 5-tuple connection criteria.

Stateful inspection, also known as dynamic packet filtering, is a firewall technology that monitors the state of active connections and uses this information to determine which network packets to allow through the firewall. Stateful inspection has largely replaced an older technology, static packet filtering.

Stateful firewalls are capable of monitoring and detecting states of all traffic on a network to track and defend based on traffic patterns and flows. Stateless firewalls, however, only focus on individual packets, using preset rules to filter traffic.

Stateless firewalls (see Figure 1) monitor network traffic and restrict or block packets based on source and destination IP addresses or other static values. They’re not ‘aware’ of traffic patterns or data flows. A stateless firewall filter does not statefully inspect traffic. …

HTTP and HTTPS both are stateless protocols. The S in HTTPS stands for Secure and it refers to use of ordinary HTTP over an encrypted SSL/TLS connection.

But we can separate the task of managing the ‘state’ from the process of moving data. and the network processes or functions that are used to build networks can be made to be ‘stateless’. For example, routers are one of the most common types of networking devices.

HTTP is called as a stateless protocol because each request is executed independently, without any knowledge of the requests that were executed before it, which means once the transaction ends the connection between the browser and the server is also lost.

UDP is a known as a “stateless” protocol, meaning it doesn’t acknowledge that the packets being sent have been received. For this reason, the UDP protocol is typically used for streaming media.

Soap as data can be used in both variants in service – stateful or stateless. By default soap service is stateless. For example WSDL soap service is stateless. Simple WebAPI, REST.

Statelessness in REST APIs. As per the REST (REpresentational “State” Transfer) architecture, the server does not store any state about the client session on the server-side. This restriction is called Statelessness. Session state is therefore kept entirely on the client.

Applications composed of microservices contain both stateless and stateful services. One of the key advantages of microservices is the ability to scale rapidly. Like other distributed computing architectures, microservices scale better when they are stateless.

REST APIs adhere to the stateless principals behind the HTTP protocol, and they are the most common way for clients and users to interact with stateless applications. Each request to a REST API contains all of the information – such as authentication data, GET/PUT/PATCH/DELETE commands, etc.

WebSocket is a stateful protocol, whereas REST is based on stateless protocol, i.e. the client does not need to know about the server and the same hold true for the server. WebSocket connection can scale vertically on a single server, whereas REST, which is HTTP based, can scale horizontally.

The WebSocket protocol offers a persistent connection to exchange messages. Avoid using WebSockets if only a small number of messages will be sent or if the messaging is very infrequent. Unless the client must quickly receive or act upon updates, maintaining the open connection may be an unnecessary waste of resources.

Simple RESTful application uses HTTP protocol which is stateless. All the frequently updated applications used WebSocket because it is faster than HTTP Connection.

Messages can be received or sent by both server or client. 3. It is Request-response model. It is Full duplex model.

For example, a WebSocket API can be used to provide real-time notifications while the REST API can be used to manage your resources. WebSocket is a bi-directional, full-duplex and persistent connection protocol, hence it’s stateful.

The WebSocket API is an advanced technology that makes it possible to open a two-way interactive communication session between the user’s browser and a server. With this API, you can send messages to a server and receive event-driven responses without having to poll the server for a reply.