Network Topology Tree and Mesh

In tree topology  a central 'root' node (the top level of the hierarchy) is connected to one or more other nodes that are one level lower in the hierarchy (i.e., the second level) with a point-to-point link between each of the second level nodes and the top level central 'root' node. Means nodes in a tree are link to central hub that controls the traffic to the network but not every device plugs directly to the central controller. Most of the devices are connect to some secondary hub, which in turn connected to central hub.

Tree topology

A very good example of tree topology is the cable TV network.

Advantages

·        Scalable

·        More manageable (because, of different levels of network).

Disadvantages

·        Maintenance may b an issue

Mesh Topology

In mesh network topology every nodes has a dedicated connection to every other nodes. The dedicated connections in the mesh topology only caries the traffic between two devices it connects. A fully connected mesh topology has n(n-1)/2 physical channels to link n devices. To manage this much links very device on the network must need (n-1) input output ports.

Mesh topology

Advantages

·        Secure

·        Robust

·        Eliminate traffic problems

Disadvantages

·        Many ports are needed in each device

·        Installation and reconfiguration are difficult

·        Expensive due to huge cabling

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