-Tree Topology is a combination of the BUS and STAR Topology. The tree like structure allows you to have many servers on the network and you can branch out the networks in many ways. This is particularly helpful for colleges, universities and schools so the each of the branches can identify the relevant systems in thier own network and yet connect to the big network in some way.
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-Bus (Line) nodes are connected to a main (bus) cable. If data is being sent between nodes then other nodes cannot transmit. If too many nodes are connected then the transfer of data slows dramatically as the nodes have to wait longer for the bus to be clear.
-A Fully connected network is a mesh network in which each of nodes is connected to each other. A fully connected network doesn't need to use switching nor broadcasting.
-Star networks are one of the most common computer network topologies. In its simplest from, a star network consits of one central switch, hub or computer which acts as a conduit to transmit messages.
-Mesh network differ from other networks in that the component parts can all connect to each other via multiple hops, and they generally are not mobile. Mesh network can be seen as one type of adhoc network.
-A Ring network is a network topology in which each node connects to excatly two other nodes, forming a sinlge continous pathway for signals through each nodes - a ring. Dat travels from node to node, with each node along the way handling every packet. 
