This company has 3 sites. Site A has 5 rooms.

Site B has 1 room.

Site C has 4 rooms.

You are have been assigned the net block 128.60.80.0/23 by your ISP. You will link up
to them with via a serial link using 64.4.5.8/30 (.9 is them, .10 is your end).

At site A you have 5 rooms which need to support up to 45 hosts each.
They can all be on the same subnet (but don't necessarily have to be)
At site B you have 40 workstations. They should all be on the same subnet
At site B you also have 25 servers behind a router/firewall. These hosts
are to be firewalled from internal as well as external hosts.
The router/firewall has 2 Ethernet interfaces (eth0 and eth1)
At site C you have 4 rooms with 20 workstations each.
They can all be on the same subnet (but don't necessarily have to be)

Site A links to Site B via a dedicated Serial interface.
Site B links to Site C via a dedicated Serial interface.
Site C links to the ISP via a dedicated Serial interface.

Divide up the /23 you have been assigned to accommodate the needs of the site.

Produce one logical map which shows a layer 3 map of the network and
includes all subnets and address ranges for each subnet. Produce
documents which show each physical network, a layer 2 picture. One for
each network.

See this link for examples of the physical and logical diagrams.

You can use any tools you like, including hand drawings (as long as I can understand them and they
look nice).

Also include a textual description of the network which describes
the subnets you designed and allocated to each location. Here is an example.