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Re: Internet Architecture Diagram - Comments Please

  • From: Dan Wing
  • Date: Thu Mar 19 12:26:56 1998

In article <[email protected][]>, [email protected] (Dean 
Anderson) wrote:

>There pretty clearly *are* routers in the diagram. Those would be those
>little blue and green interconnected dots.  You can tell by the "Large
>Capacity Routers and Switches" label.   Perhaps you didn't see the same
>diagram I saw.

User's Comm Equipment
There would be routers around the firewall (or the firewall is a 
router doing simple packet filtering).  There would typically be 
routers inside the corporation.  There would often be routers on a
LAN (depending on your definition of "local").

Local Loop Carrier
Leased lines (T1s, 56Kb, etc.) will typically have routers on each
end of the line.

Should include @home (

You dial into a router.  Cisco has a web site,

User Services
Not always provided by the ISP.  For example, DNS, email, USENET, and
other services are almost always provided by your company.  They are
provided by your ISP if you're dialing into your ISP.

Again, routers could be between these services.  Should include
web servers as one of these services; some ISPs use web servers
for trouble-ticket reporting.

ISP backbone
The first time we've seen routers

Online content
Typically provided by an ISP (which could be your own ISP) or a 

You're really going "back up" the same chain of possibilities that
we went down.  Understanding this would help people a lot -- each
site is similar to their own and made similar decisions for who
hosts email, DNS, firewalling, etc.

Origins of Online Content
Same as 'online content' -- you're going "back up".

>I might suggest that more detail on the variation of the corporate network
>could be helpful. Internal networks of large corporations like Hitachi (7th
>largest corporation in the world) are many times more complicated than even
>large ISP interconnects.   I find this is the biggest problem that most
>people I talk to have. They understand a dialup connection.  They
>understand an ethernet. They don't understand that the technology to scale
>their company from 5 to 50 to 300 to 10,000 is much different from one
>scale to another.  They mainly don't understand the scaling issues.

I agree.  The diagram of the corporation should somehow indicate
this.  Not sure how it could fit into the current web page as it
is designed, though.

-Dan Wing