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Ans. A VPC is devided into multiple subnets. Subnet in a particular VPC could be public or private.
For Example - A particular account may have multiple vpc's for each of the business type. For each Business or VPC , One can have different subnets to cater to each department so that access across departments could be restricted. But still there could be identities that have control over different subnets. Moreover we could have multiple subnets for each department so as to have distinguished public and private networks having different types of applications ( public facing or internal consumption )
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Ans. servlet is a small, server-resident program that typically runs automatically in response to user input. A network socket is an endpoint of an inter-process communication flow across a computer network.
We can think of it as a difference between door and gate. They are similar as they both are entry points but they are different as they are put up at different areas.
Sockets are for low-level network communication whereas Servlets are for implementing websites and web services
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Ans. RMI stands for Remote Method Invocation. Traditional approaches to executing code on other machines across a network have been confusing as well as tedious and error-prone to implement. The nicest way to think about this problem is that some object happens to live on another machine, and that you can send a message to the remote object and get a result as if the object lived on your local machine. This simplification is exactly what Java Remote Method Invocation (RMI) allows you to do.
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Ans. A media access control address is a unique identifier assigned to network interfaces for communications at the data link layer of a network segment. MAC addresses are used as a network address for most IEEE 802 network technologies, including Ethernet and Wi-Fi.
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Ans. Encapsulation is the process of wrapping the data with another layer to be transported across the network with the source and destination details on just like the analogy of wrapping letter in envelope with the source and destination details on the envelope. Encryption on the other hand is the process of hashing text or transforming the data in a form that is not readable except you have access to the key use to decrypt it.
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Ans. An application layer is an abstraction layer that specifies the shared communications protocols and interface methods used by hosts in a communications network.
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