[Year 12 SofDev] Network Diagrams - Physical or Logical

[Kevin Feely]

Hi All
Just to clarify one part of these things that i get a number of students 
representing firewalls inaccurately.
I find some students like to connect them all up in series (see attached 
picture), so that from the switch they go to a firewall, then to a 
router then to the phone lines to the internet.
Or even worse the go from the switch to a firewall and then to the 
internet with no mention of a router or modem.
I have always put, or seen installed, firewalls (hardware, naturally)  
connected  to the network switch (doesn't matter which one) and thats 
it. There is no "throughput". ie as you represent a server ,as basically 
thats what they are.
The router (or modem if you want to go back a few years) is the 
throughput device, on one side the phone line (PSTN, ADSL, CABLE, ETC) 
and on the other the network connection to switch via ethernet, to 
switch from pc via usb from router, or to switch from pc via serial from 
modem.
Is this a problem to your students or is it just me?

regards
kevin

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