multiple address ranges on one physical segment

[Frank A, Zanotti]

Hi,
I am studding for my Microsoft networking test and I am a little
confused about Physical segments. This is probably a stupid question. How
can I have logical IP subnets on one physical segment. What is a physical
segment. On a switched network you have a switch with VLAN's say
(192.168.100.0) and (192.168.101.0) and each workstation or server plugs
into their specific port on the switch. Listed below is an answer to one of
my test question that I don't fully understand. The last line is what
confuses me the most.
Any help would be greatly appreciated
(e-mail address removed)

When you want to use a Windows 2000 DHCP server to configure
multiple logical networks, also known as multinets, on a single
physical segment, you can define a superscope that includes a member scope
for each multinet. You cannot define a standard DHCP scope that includes
multiple address ranges. Although you can define multiple scopes on one
DHCP server, you can only use one scope at a time to actively assign
leases on a single physical segment, unless you use a superscope. It
is possible to use multiple address ranges on one physical segment.

 

[john]

Liken it to your hard drive. you have the actual physical
hard drive and then you break it down into seperate
logical drives. its the same as a physical network that is
broken down into logical subnet. does that make sense?

 

[Frank A, Zanotti]

I sure am trying but still clouded, I mean I totally understand what your
saying in the hard drive example and I understand subnetting very well, but
let me kind of rephrase my question. A physical subnet is connected to a
switch which is connected to a router interface ( only one router interface)
and the network is 192.168.100.0, so now 192.168.100.0 is the logical ip
subnet, that I understand. So have I described a physical segment with a
logical IP subnet?. If so how is it possible to have two logical IP subnets
on one Physical subnet in the same scenario one switch connected to one
router interface. The only way I can see this happening is if CIDR is
enabled on the router.
(e-mail address removed)