---
title: "Discussion on \"Network Part 2 - The Cost of a TCP Handshake\" | Hashnode"
description: "Discussion on \"Network Part 2 - The Cost of a TCP Handshake\". The structural cost of TCP's 3-way handshake — what RTT and TIME_WAIT mean under high-volume traffic, and why Transaction Cost Theory explains the birth of Keep-Alive."
url: "https://hashnode.com/posts/network-part-2-the-cost-of-a-tcp-handshake/69fde56d3c7289793162a940"
---

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Discussion

# [Network Part 2 - The Cost of a TCP Handshake](https://lukyday.hashnode.dev/network-part-2-the-cost-of-a-tcp-handshake?utm_source=hashnode&utm_medium=feed)

The structural cost of TCP's 3-way handshake — what RTT and TIME\_WAIT mean under high-volume traffic, and why Transaction Cost Theory explains the birth of Keep-Alive.

May 8 · 5 min read · lukyday.hashnode.dev  
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-   [#networking](https://hashnode.com/tag/networking)
-   [#network](https://hashnode.com/tag/network)
-   [#backend](https://hashnode.com/tag/backend)
-   [#tcp](https://hashnode.com/tag/tcp)
-   [#protocols](https://hashnode.com/tag/protocols)

## 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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