# Network Topology.docx - Wikispaces

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```					             Network Topologies
Definitions
LAN- LAN stands for local area network, which is a computer network that interconnects
computers in a limited area. Due to the fact that in limits your area it would be best
used in areas such as a home, or school.

WAN- WAN stands for wide area network, which is a telecommunication network that
covers a large area. Due to the network covering a large area it would be best used in
Business and/or Government settings, where they could have to communicate
effectively throughout the work day.

Network Topology- Network Topology is the layout of multiple things in relation to a
computer or biological network. They can be put into two categories physical or logical.
Physical topology is the physical design of a network, which includes the devices, and
locations. A Logical topology is how data is transferred in a network which is unlike
physical topology were it focuses on the physical aspect of it.

Types of Network Topologies
In the study of network topologies there are seven basic topologies. These Include
Point-to-point, Bus, Star, Ring, Mesh, Tree, Hybrid, and Daisy chain.

Bus                Star             Ring              Mesh                 Tree
Ring Topology
A Ring Topology is a network topology that is set up in a circle, in which data travels
around the ring in one direction and each device on the right acts as a repeater to keep the
signal strong.

 Doesn’t need a central node to manage the connectivity
 Performs better those most topologies under heavy network load
 Very orderly network

   If one computer doesn’t resend the signal it creates problems for the entire network
   There is communication delay depending on the number of nodes
   Bandwidth is shared on all links between devices

Star Topology
A Star Topology is a network topology that contains one central hub or computer, where
nodes are then connected off of it. The star topology is the easiest topology design and
implement.

o Better performance than other topologies because there is only one hub that acts as a
signal repeater
o Each node is isolated and doesn’t depend on other nodes
o Since there is only one hub, connecting devices to it or increase its capacity increase the
size of the network easily

   If the central hub fails all of the nodes networks do not work
   Whole network depends on this central hub
Bus Topology
A Bus Topology is a network topology that is a set of nodes that are connected by one
shared communications line.

 Easy to find anything wrong with connecting cables
 Since only one cable is used it is very cost effective
 Easy to add more nodes

The performance of the network gets worse as more computers are added, because
they share bandwidth
Has slower data transfer than other topologies
If there is a problem with the cable, the entire network breaks down

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