Topology

Topology

1. What is a topology?

   • A Topology is basically the layout of a network. Networks can be arranged in lots of different Topologies but Star Topology and Mesh Topology are the main and most commonly used ones.

2. Types of Topology

   • Mesh Topology
     • Disadvantages
       • many connections would mean a lot more maintenance is needed
       • many connections would be expensive to implement
     • Advantages
       • communications should always get through as there are many possible routes
       • as there are multiple connections and no central node, a node should not become isolated
     • How are the Nodes connected?
       • With a full mesh topology, each node is directly connected to every other node. This means a communication can be sent along many individual or multiple routes.
   • Star Topology
     • How are the Nodes connected?
       • All of the Nodes indirectly connect through a switch, hub or router. The switch, hub or router acts as a central point through which all communications are passed.
     • Advantages
       • Management of the network can be done centrally
       • New Nodes can be added easily by connecting them to a switch
     • Disadvantages
       • The whole network fails if the central point fails because the Nodes can't communicate
       • Wired star networks can be expensive if you want to connect lots of devices