How can messages get delivered out of order even when sent over TCP?

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Under “Network Asynchrony” section, it is mentioned that messages can be delivered out of order. How is it possible if messages are sent over TCP?

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Hi @Manikanta_Reddy_M_V , can you please share the lesson link? Thanks!

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In Difficulties Designing Distributed Systems - Distributed Systems for Practitioners (educative.io) it is mentioned that “They may even deliver out of order”. I wanted to understand how is it possible if TCP is used?

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Thanks for sharing the lesson link. Your query will be answered shortly.

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Hi @Manikanta_Reddy_M_V We talked about network issues in general under the “Network Asynchrony” section.
The messages are delivered in order with TCP, but some applications can’t afford to use TCP.

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Thanks for the response. Got it.

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