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The journey of an internet packet: Exploring networks with traceroute

sebastianmarines.com

11–20 of 116 posts

Re: The journey of an internet packet: Exploring networks with traceroute

#11
post #8

It always amazes me in-depth HN gets on pretty much any subject, yet the most basic cursory network page gets massive response Is there simply a total lack of understanding of how networks work in the tech community?

I'm often tasked with explaining technical concepts to people with entry-level knowledge so simple, clear documents like this are very helpful resources.

Re: The journey of an internet packet: Exploring networks with traceroute

#14
post #3

seems like clickbait traceroute uses udp to a high-port for discovery, not icmp-echo.

traceroute supports multiple protocols, not just UDP and ICMP.

true, the type of packet does not really matter.

my apologies if this misconstrued my point about the lacking quality of the article.

Re: The journey of an internet packet: Exploring networks with traceroute

#15
post #8

It always amazes me in-depth HN gets on pretty much any subject, yet the most basic cursory network page gets massive response Is there simply a total lack of understanding of how networks work in the tech community?

People who want to learn how ISP networks work can go and join DN42, a LARPing copy of the Internet.

Re: The journey of an internet packet: Exploring networks with traceroute

#16
post #9
post #3

seems like clickbait traceroute uses udp to a high-port for discovery, not icmp-echo.

Windows tracert uses ICMP Source: https://support.microsoft.com/en-gb/topic/how-to-use-tracert... > The TRACERT diagnostic utility determines the route to a destination by sending Internet Control Message Protocol (ICMP) echo packets to the destination

true, most computers don't run windows though.

anyways, the type of packet does not really matter.

Re: The journey of an internet packet: Exploring networks with traceroute

#17
post #8

It always amazes me in-depth HN gets on pretty much any subject, yet the most basic cursory network page gets massive response Is there simply a total lack of understanding of how networks work in the tech community?

I'm often tasked with explaining technical concepts to people with entry-level knowledge so simple, clear documents like this are very helpful resources.

Would a “a for loop in node js” or “serving an webpage in Python” get so much attention?

Re: The journey of an internet packet: Exploring networks with traceroute

#18
post #8

It always amazes me in-depth HN gets on pretty much any subject, yet the most basic cursory network page gets massive response Is there simply a total lack of understanding of how networks work in the tech community?

Networking is a black box for many developers.

Why would it be any different if you're developing a CRUD application with a bunch of SREs / datacenter engineers on the line? They are very good at abstracting networking away from software engineers.

Re: The journey of an internet packet: Exploring networks with traceroute

#19
post #13

If the destination machine has disabled ping, what response is recieved?

nothing from that machine, but the way the ttls work, it doesn’t affect the responses from routers along the way. Same if the destination doesn’t exist at all.

Re: The journey of an internet packet: Exploring networks with traceroute

#20
post #3

seems like clickbait traceroute uses udp to a high-port for discovery, not icmp-echo.

I agree that this doesn’t seem to have been written by someone that actually understands the topic.

Even the network diagram at the beginning is not very good. Can you create network architectures where 10.0.0.1 and 10.0.0.2 are not layer 2 adjacent? Yes, but they’re fairly complex and would imply that a lot of other necessary information is missing from the diagram. And should you use such an architecture as an example to explain traceroute? Absolutely not. It’s hard to imagine someone with even a CCNA level understanding of networking coming up with this.

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