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#
Authors:
James F. Kurose, Keith W. Ross
Chapter:
Transport Layer
Exercise:
Review
Question:6 | ISBN:9780132856201 | Edition: 6

Question

Is it possible for an application to enjoy reliable data transfer even when the application runs over UDP? If so, how?

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Answer

Yes.

The application developer can put consistent data transfer into the application layer protocol. It contains a significant amount of work and debugging.


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Discussions

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Yes. It is possible for an application to enjoy reliable data transfer even when it runs over UDP (User Datagram Protocol), which is a connectionless transport protocol that does not provide any guarantees for reliable data transmission.

 

One way to achieve reliable data transfer over UDP is by implementing the reliability mechanisms at the application layer. For example, the application can use acknowledgments, retransmissions, and sequence numbers to ensure that all data is delivered reliably to the receiver. This approach is often used in real-time applications, such as online gaming and video streaming, where a small amount of packet loss or delay can have a significant impact on the user experience.

 

Another approach is to use a reliable UDP (RUDP) protocol, which is a modified version of UDP that provides reliable data transfer. RUDP adds reliability mechanisms, such as acknowledgments and retransmissions, to ensure that data is delivered reliably to the receiver. RUDP is commonly used in applications that require low latency and high throughput, such as online gaming, voice over IP (VoIP), and streaming media.

 

 

In summary, while UDP does not provide any guarantees for reliable data transmission, it is still possible for an application to enjoy reliable data transfer over UDP by implementing reliability mechanisms at the application layer or using a reliable UDP protocol like RUDP.

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