In order for a server to know that one of his remote objects given by clients is no longer in use, how does he know?
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In order for a server to know that one of his remote objects given by clients is no longer in use, how does he know?
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- How does a server know that one of the distant objects he provides to clients is no longer in use and may be collected?How does a server realise that a remote item he has been providing to clients is no longer needed and may be collected?When does a proxy create an acknowledgment (ack) after receiving a response, and when does it just transport the response without doing so?
- When does a proxy send an acknowledgement to a response and when does it simply forward the response without sending an acknowledgement?A client application connects to a server and sends an operation, and gets a result back. What happens then? Is the connection open, so that the client can send more operations? Answer the question comparing the protocols SMTP, FTP, HTTP, POP and IMAP. What are the pros and cons of keeping the connection open or closing it down after each operation?A client application establishes a connection to a server, transmits an action, and waits for a response. What happens then? Is the connection still accessible for other operations? Compare the protocols SMTP, FTP, HTTP, POP3, and IMAP. What are the advantages and disadvantages of maintaining or terminating the connection between operations?
- FTP sometimes uses a random port for data transfer, but an FTP server always, unless programmed otherwise, listens to the same port for session requests from clients. What port does an FTP server listen on?When a client involves a remote message, it calls a proxy not the original method true or falseA single link between two hosts can be used to send more than one file. Please tell me when shipments can be cleared. Is there a set amount of time for one wait and some flexibility with the other?
- While an FTP server continuously listens to the same port for session clients, FTP uses a random port for data delivery. What port does an FTP server use?The server-side communication socket is supported by ServerSocket class in java.net package. After connection is established it uses Socket class to communicate with client. Write a complete Java program to implement Transmission Control Protocol (UDP) client and server.In contrast to the port that is used for data transfer, which is randomized by FTP, the port on which an FTP server waits for session clients remains fixed. Port number for an FTP server.