The possibility of having surprises toward the end of the project lifecycle is reduced.īecause we have designed the API first, the tests can be designed while the code is being developed. Since we have ironed out most of the uncertainties when the project starts, the overall development process is smoother, and the software quality is greatly improved.ĭevelopers are happy about the process as well because they can focus on functional development instead of negotiating sudden changes. Improve software quality and developer productivity We can mock requests and responses to validate the API design before writing code. It is recommended that the organization speak the same language via API design. The dedicated functional teams are only responsible for their own components and services. Separate functional teams need to speak the same language. It is better to think through the system's complexity before writing the code and carefully defining the boundaries of the services. While this kind of architecture facilitates decoupling and segregation of duty, we need to handle the various communications among services. We have separate services to serve different functions of the system. Microservices increase system complexity. Each layer can rely on the headers for processing instructions and does not need to know the meaning of the data from the last layer. We need layers in the network model because each layer focuses on its own responsibilities. The headers are removed layer by layer, and eventually, Device B can read the data. Steps 6-10: When Device B receives the bits from the network, it performs the de-encapsulation process, which is a reverse processing of the encapsulation process. Step 5: The encapsulated frames are sent to the physical layer and sent over the network in binary bits. Step 4: The IP datagram is added a MAC header at the data link layer, with source/destination MAC addresses. The IP header contains the source/destination IP addresses. Step 3: The segments are then encapsulated with an IP header at the network layer. The header contains the source port, destination port, and sequence number. It is encapsulated into TCP segments at the transport layer. Step 2: Then a TCP or a UDP header is added to the data. Step 1: When Device A sends data to Device B over the network via the HTTP protocol, it is first added an HTTP header at the application layer.
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