Computer Network Topologies

Computer Network Topologies

1. What is a topology?

   • A network's topology is the arrangement, or pattern, in which all nodes on a network are connected together.

2. Types of Topology

   • Star Topology
     • Disadvantages
       • The whole network is affected if the central point fails because no node can communicate
       • Wired star networks can be expensive if you need to connect lots of devices
     • Advantages
       • a failure of one node or its connection doesn't affect any other nodes
       • New nodes can be added to the network easily by connecting them to the switch
     • How are nodes connected?
       • Nodes are connected via wire or wireless.
     • What is a star topology?
       • All nodes indirectly connected to each other through a switch, hub or router. The switch acts as a central point through which all communications are passed.
   • Mash Topology
     • What is mesh topology?
       • In a mesh topology there is no central connection point. Each node is connected to at least one other node (usually to more than one). A node is capable of sending communications to and receiving communications from other nodes. The nodes pass on communications until they reach their final destinations. There are two types of mesh topology: full mesh topology and partial mesh topology.
     • Disadvantages
       • Many connections would mean a lot more maintenace is needed
       • Many connections would be expensive to implement
     • Advantages
       • Communications can be received more quickly if the route to the intended recipient is short
       • As there are multiple connections and no central node, a node should not become isolated
     • Two types
       • Full mesh Topology
       • Partial mesh topology