Answer:
The answer is A two-level customer/server is a sort of multi-level figuring design in which a whole application is conveyed as two unmistakable layers or levels.
Expalantion:
It isolates the application rationale, information, and handling among customer and server gadgets. An application that keeps running on the customer side and gets to the remote server for data is known as a customer/server application while an application that runs totally on an internet browser is known as a web application.
Advantages and disadvantages of online engineering:
The advantage of electronic frameworks is openness. You can get to it from anyplace and on anything, however you have restrains on things like stockpiling and connection measure.
The downsides are that, on the off chance that they decide to, your supplier could end your administration whenever, and in light of the fact that the capacity is on the web and out of your control, your record can be hacked, or subpoenaed, or ended, and you can't get to your email without a system association.
Upsides and downsides of Client/Server based engineering:
The advantages of a customer that recover your messages from a SMTP server is protection and control. You keep the main duplicates.
The disadvantages are that a great many people don't reinforcement legitimately, so it is anything but difficult to free the entirety of your messages, and it expects you to perform other upkeep and oversight, and you can't get to your email in the event that you don't have your own PC with you. It additionally is likely not free.
