Deciphering Routers in a N/W Visio diagram

I understand that the top IP address is the address of the router. But what do the numbers and letters underneath represent.  Co-workers on holiday vacation and have no one to ask.
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ibrahim52Connect With a Mentor Team LeaderCommented:
that is interface type. gi = Gigabit Ethernet;
ibrahim52Connect With a Mentor Team LeaderCommented:
for more information, you should take a look at this.

Referred link :-
brothertruffle880Author Commented:
Okay.  I got the Gigabit Ethernet part.  
What does the 0/0, 0/1.100 and 0/2 mean?
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ibrahim52Team LeaderCommented:
Those are FastEthernet interface.
brothertruffle880Author Commented:
I'm trying to understand the significance of the numbers before and after the slash.  

The three sets of numbers surrounding the router I'm trying to understand are:

What do these combinations of numbers mean?
On cisco routers you can have multiple interfaces on a single card and you can install multiple cards in the chassis so Gi 0/0 Gi 0/1 and Gi 0/2 are referring to individual Gigabit interface ports 0 1 and 2 on the card that is in slot 0.
The .100 (0/1.100) is a subinterface, this is a virtual interface that can be created from a physical port for the purpose of routing between vlans

Real Gigabit port       0/1
         Subinterface     0/1.100 (maybe vlan 100)
         Subinterface     0/1.200 (maybe vlan 200)

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