•A network topology refers to the layout of the computers and devices
in a communications network.
•Network topologies are categorized as:
1) Physical Topology
-The physical
topology of a network refers
to the arrangement/configuration of cables, computers, and other devices
(nodes)
in a network.
2) Logical Topology
- The
logical
topology of a network refers
to the path that data travels between nodes on a
network.
3 Basic Types Of Network Topology
A)Bus Network Topology
A)Bus Network Topology
•consists of a single central cable called a backbone/trunk, which connects all the nodes in a
network using the T-Connector.
•
A terminator is required at each end of the bus cable to prevent the signal from
bouncing back and forth on the bus cable.
•A cable that forms a closed loop or ring,
with all the nodes
arranged along
the ring.
•In ring topology, data travels from one node to another node in one direction (clockwise or counterclockwise) to all the nodes until
the data
reaches its final destination.
•Token
passing is one method for sending data around a ring.
C) Star Network Topology
•Star topology uses a central
device(hub, switch) where all the nodes are connected to it using
cables.
•In star
topology, all data that transfer from one node to another passes through the hub
or switch until it reaches the destination node.
•Hub : Takes a signal from the sender
and passes it to all
the nodes in the network until it reaches the
recipient.
