Error DetectionIf error detection is provided at lower OSI layers, do you think that it isstill important for UDP to provide this service, given that it is consideredan "unreliable" protocol?

Answered: Error Detection If error detection is…

Computer Networking: A Top-Down Approach (7th Edition)

7th Edition

ISBN:9780133594140

Author:James Kurose, Keith Ross

Publisher:James Kurose, Keith Ross

Chapter1: Computer Networks And The Internet

Section: Chapter Questions

Problem R1RQ: What is the difference between a host and an end system? List several different types of end...

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Question

Error Detection
If error detection is provided at lower OSI layers, do you think that it is
still important for UDP to provide this service, given that it is considered
an "unreliable" protocol?

Expert Solution

Step 1

Solution:

Yes, even if error detection is provided at lower OSI layers, it is still important for User Datagram Protocol (UDP) to provide its own error detection mechanism.

While it is true that error detection at lower layers can catch some types of errors, it may not be able to catch all errors that occur during transmission. For example, lower layer error detection may not be able to detect errors in the packet header or data payload. Also, errors can be introduced by the network itself, such as when packets are lost or corrupted during transmission, and it is up to the transport layer to detect and handle these errors.