---
title: "Discussion on \"Routing, ICMP & the UDP Datagram — How Data Travels, Gets Diagnosed, and Moves Fast\" | Hashnode"
description: "Discussion on \"Routing, ICMP & the UDP Datagram — How Data Travels, Gets Diagnosed, and Moves Fast\". How routers and switches move data, how ping and traceroute use ICMP and TTL to diagnose it, and why UDP's 8-byte header is built for speed."
url: "https://hashnode.com/posts/routing-icmp-udp-and-the-udp-datagram-explained/6a660e64ddd7f2a97f6767dd"
---

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Discussion

# [Routing, ICMP & the UDP Datagram — How Data Travels, Gets Diagnosed, and Moves Fast](https://weeklyupdate.hashnode.dev/routing-icmp-udp-and-the-udp-datagram-explained?utm_source=hashnode&utm_medium=feed)

How routers and switches move data, how ping and traceroute use ICMP and TTL to diagnose it, and why UDP's 8-byte header is built for speed.

Jul 26 · 8 min read · weeklyupdate.hashnode.dev  
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-   [#routing](https://hashnode.com/tag/routing)
-   [#icmp](https://hashnode.com/tag/icmp)
-   [#traceroute](https://hashnode.com/tag/traceroute)
-   [#udp](https://hashnode.com/tag/udp)
-   [#datagram](https://hashnode.com/tag/datagram)
-   [#ping](https://hashnode.com/tag/ping)
-   [#tcpip-model](https://hashnode.com/tag/tcpip-model)
-   [#netwroking](https://hashnode.com/tag/netwroking)
-   [#computer-networking](https://hashnode.com/tag/computer-networking)
-   [#learning-journey](https://hashnode.com/tag/learning-journey)
-   [#learning-in-public](https://hashnode.com/tag/learning-in-public)

## Written by

[Abhijeet Shinde](https://hashnode.com/@abhijeet2005)

@abhijeet2005 · Mumbai

  
[View profile](https://hashnode.com/@abhijeet2005)

Curious Polymath | Student Software Engineer | Learning to Build Reliable & Scalable Systems

I’m a curious learner and aspiring software developer who enjoys building real-world systems, exploring new technologies, and learning in public. I write about coding, personal growth, and turning ideas into practical systems—while simplifying complex concepts for others.

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