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From: rbowman <bowman@montana.com>
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Subject: Re: ISP router [Was: Yes, You Need A Firewall On Linux - =?UTF-8?B?SGVyZeKAmXM=?= Why And Which To Use]
Date: 23 Aug 2025 05:51:47 GMT
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On Sat, 23 Aug 2025 00:28:45 -0000 (UTC), Lawrence D’Oliveiro wrote:

> On Fri, 22 Aug 2025 21:56:37 +0100, The Natural Philosopher wrote:
> 
>> A packet from your ONT gets thrown onto a huge optical backbone via the
>> OLT  and routed off to the ISP.
> 
> At layer 2 it’s called a “frame”. “Packet” is the term for layer 3 and
> above.

All these years and I still don't have the OSI model down pat. otoh I'm 
not a network engineer and there are many thing in life where It Just 
Works is good enough for me. I do know more about TCP tables and ICMP 
statistics than I ever necessarily wanted to.