We are aware that TCP's transport layer performs end-to-end error handling. Theoretically, error detection and correction are not necessary at the connection layer, but they are performed there anyway. Why is including error detection and correction at both the connection and transport layers advantageous?

Systems Architecture
7th Edition
ISBN:9781305080195
Author:Stephen D. Burd
Publisher:Stephen D. Burd
Chapter9: Computer Networks
Section: Chapter Questions
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We are aware that TCP's transport layer performs end-to-end error handling. Theoretically, error detection and correction are not necessary at the connection layer, but they are performed there anyway. Why is including error detection and correction at both the connection and transport layers advantageous?

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