Explaining 9 types of API testing. The method to download the high-resolution PDF is available at the end.
🔹 Smoke Testing
This is done after API development is complete. Simply validate if the APIs are working and nothing breaks.
🔹 Functional Testing
This creates a test plan based on the functional requirements and compares the results with the expected results.
🔹 Integration Testing
This test combines several API calls to perform end-to-end tests. The intra-service communications and data transmissions are tested.
🔹 Regression Testing
This test ensures that bug fixes or new features shouldn’t break the existing behaviors of APIs.
🔹 Load Testing
This tests applications’ performance by simulating different loads. Then we can calculate the capacity of the application.
🔹 Stress Testing
We deliberately create high loads to the APIs and test if the APIs are able to function normally.
🔹 Security Testing
This tests the APIs against all possible external threats.
🔹 UI Testing
This tests the UI interactions with the APIs to make sure the data can be displayed properly.
🔹 Fuzz Testing
This injects invalid or unexpected input data into the API and tries to crash the API. In this way, it identifies the API vulnerabilities.
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Explaining 8 Popular Network Protocols in 1 Diagram. The method to download the high-resolution PDF is available at the end.
Network protocols are standard methods of transferring data between two computers in a network.
1. HTTP (HyperText Transfer Protocol)
HTTP is a protocol for fetching resources such as HTML documents. It is the foundation of any data exchange on the Web and it is a client-server protocol.
2. HTTP/3
HTTP/3 is the next major revision of the HTTP. It runs on QUIC, a new transport protocol designed for mobile-heavy internet usage. It relies on UDP instead of TCP, which enables faster web page responsiveness. VR applications demand more bandwidth to render intricate details of a virtual scene and will likely benefit from migrating to HTTP/3 powered by QUIC.
3. HTTPS (HyperText Transfer Protocol Secure)
HTTPS extends HTTP and uses encryption for secure communications.
4. WebSocket
WebSocket is a protocol that provides full-duplex communications over TCP. Clients establish WebSockets to receive real-time updates from the back-end services. Unlike REST, which always “pulls” data, WebSocket enables data to be “pushed”. Applications, like online gaming, stock trading, and messaging apps leverage WebSocket for real-time communication.
5. TCP (Transmission Control Protocol)
TCP is is designed to send packets across the internet and ensure the successful delivery of data and messages over networks. Many application-layer protocols build on top of TCP.
6. UDP (User Datagram Protocol)
UDP sends packets directly to a target computer, without establishing a connection first. UDP is commonly used in time-sensitive communications where occasionally dropping packets is better than waiting. Voice and video traffic are often sent using this protocol.
7. SMTP (Simple Mail Transfer Protocol)
SMTP is a standard protocol to transfer electronic mail from one user to another.
8. FTP (File Transfer Protocol)
FTP is used to transfer computer files between client and server. It has separate connections for the control channel and data channel.
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