Networking Guide

Introduction The OSI Reference Model
Physical Media Cat 5 Wiring Scheme
Network Components Network Topologies
Network Architectures Network Types

Networking Guide : Network Topologies

In star topology, all nodes are connected to a central point which is called a hub. A sending node transmits its message (signal) to the hub. The hub then retransmits the signals to all other nodes. Each receiving node checks the signal's destination address, if it matches the node's address it processes the signals.

A star network is easier to monitor because it has a central point. Adding and removing a node is as simple as plugging a cable to a wall jack or a hub. Failure in one node doesn't affect the other nodes. However, if the hub fails the network will stop working. Ethernet 10BaseT, 100BaseT, and 1000BaseT networks are examples of LAN technology that uses star topology.

star topology
Picture: Star Topology
Each node is connected to a hub.

Cluster tree topology is a star topology that has branches. A cluster tree network derives the attributes of a star network. 

cluster tree topology
Picture: Cluster Tree Topology
Two hubs provide connection between two star networks.

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