---
title: "Discussion on \"Network Part 5 - CDN, WebSocket, and Idempotency: When the Parts Meet Traffic\" | Hashnode"
description: "Discussion on \"Network Part 5 - CDN, WebSocket, and Idempotency: When the Parts Meet Traffic\". Four real scenarios — image loading, real-time chat, global routing, and payment retries — where Parts 1–4 stop being theory and start being architecture decisions."
url: "https://hashnode.com/posts/network-part-5-cdn-websocket-and-idempotency-when-the-parts-meet-traffic/6a04bc19a0c1540277626a29"
---

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Discussion

# [Network Part 5 - CDN, WebSocket, and Idempotency: When the Parts Meet Traffic](https://lukyday.hashnode.dev/network-part-5-cdn-websocket-and-idempotency-when-the-parts-meet-traffic?utm_source=hashnode&utm_medium=feed)

Four real scenarios — image loading, real-time chat, global routing, and payment retries — where Parts 1–4 stop being theory and start being architecture decisions.

May 13 · 14 min read · lukyday.hashnode.dev  
Read the article

-   [#networking](https://hashnode.com/tag/networking)
-   [#network](https://hashnode.com/tag/network)
-   [#cdn](https://hashnode.com/tag/cdn)
-   [#http](https://hashnode.com/tag/http)
-   [#dns](https://hashnode.com/tag/dns)
-   [#websockets](https://hashnode.com/tag/websockets)
-   [#load-balancing](https://hashnode.com/tag/load-balancing)
-   [#idempotence](https://hashnode.com/tag/idempotence)
-   [#tcp](https://hashnode.com/tag/tcp)
-   [#backend](https://hashnode.com/tag/backend)
-   [#system-design](https://hashnode.com/tag/system-design)

## Written by

[Dayul Lee](https://hashnode.com/@dayul)

@dayul · Seoul, South Korea

  
[View profile](https://hashnode.com/@dayul)

Management informs. Engineering decides. Code is strategy. Every architecture decision has a reason.

Backend engineer with a foundation in distributed systems and high-concurrency architecture. I design real-time, fault-tolerant systems using Java, Go, Kafka, gRPC, and Redis — with a focus on data integrity under load. I document this philosophy in my technical blog (lukyday-blog.vercel.app), where I publish a series titled "Large-Scale Processing" — engineering decisions explained through the lens of business strategy.

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