Bus Topology, Client/Server Network, LAN Network
We
 use bus topology in the post office because it is inexpensive and 
easier for us to install. If we adding or removing a node such as a 
personal computer from the backbone, it does not affect the rest of the 
network in the post office.And if there is a failure of one node in the 
network, it also does not affect the rest of the network.
We
 use Client/Server Network in the post office because the network can 
works in any size and does not tend to slow down if there are more nodes
 are uses in the post office. the security of the Client/Server Network 
also more advance than Peer to Peer Network because we can use our 
personal profile by using a password to access so the others cannot 
access our computer because of the passwords that we used in the 
computers.
We
 use LAN Network in the post office. This is because LAN Network is a 
network that connects computers and devices in a limited geographical 
area. So, LAN Network is suitable use in the post office building. The 
network that we use are owned and operated by an organization in the 
post office building. The communications devices that we use is switch 
or hub to connect multiple devices on a single wireless network such as 
Wi-Fi range in the post office. This is because we can share the 
information, data, hardware and software for lower cost and it also can 
saves our money on hardware expenses.

