1. Network Topologies
Charles Warren

2. Overview Network Topology Physical Logical
The arrangement of various elements of a communication network.
Physical
This refers to the layout of cabling, the locations of nodes, and the interconnections between the nodes and the cabling.
Logical
In contrast, logical topology is the way that the signals act on the network media, or the way that the data passes through the network from one device to the next without regard to the physical interconnection of the devices.

3. Bus Topology
This central cable is the backbone of the network and is known as the bus
A signal from the source travels in both directions to all machines connected on the bus cable until it finds the intended recipient.
A bus is a legacy piece of networking equipment that functions as a half-duplex connection (Clients can’t upload and download at the same time).
Advantages:
Easy to implement
Disadvantages:
Single point of failure

4. Ring Topology A ring topology is a bus topology in a closed loop.
When one node sends data to another, the data passes through each intermediate node on the ring until it reaches its destination. The intermediate nodes retransmit the data to keep the signal strong.
There is no hierarchical relationship of clients and servers.
Advantages:
When the load on the network increases, its performance is better than bus topology.
There is no need of network server to control the connectivity between workstations.
Disadvantages:
Aggregate network bandwidth is bottlenecked by the weakest link between two nodes.

5. Star topology
In local area networks with a star topology, each network host is connected to a central hub with a point-to-point connection.
The central node in this topology could be a hub, switch, or router.
The switch is the “server” and the other nodes are the “clients”.
The network does not necessarily have to resemble a star to be classified as a star network, but all of the nodes on the network must be connected to one central device.
Advantages:
Easy to implement and design.
Disadvantages:
Single point of failure

6. Fully Connected Mesh Topology
A fully connected mesh network is a network topology in which each node relays data for the network.
All mesh nodes cooperate in the distribution of data in the network.
Can be applied in wired and wireless networks.
To ensure that all its paths are available, the network must allow for continuous connections and must reconfigure itself around broken paths, using self-healing algorithms such as Shortest Path Bridging.
Advantages:
Reliable and Secure.
Disadvantages:
Cost and connections grow exponentially as more hosts are added.
Wireless mesh networks can be considered a type of Wireless ad hoc network.
A fully connected network does not need switching or broadcasting.

7. Partially Connected Mesh Topology
In a partially connected network, certain nodes are connected to exactly one other node; but some nodes are connected to two or more other nodes with a point-to-point link.
Advantages:
Cost effective
Disadvantages
Not fully redundant

8. Centralization
To alleviate the amount of network traffic that comes from broadcasting all signals to all nodes, more advanced central nodes were developed that are able to keep track of the identities of the nodes that are connected to the network.
Advantages:
Easy management
Low cost
Disadvantages:
Single point of failure

9. Decentralization
A fully connected network, complete topology, or full mesh topology is a network topology in which there is a direct link between all pairs of nodes. In a fully connected network with n nodes, there are n(n-1)/2 direct links. Networks designed with this topology are usually very expensive to set up, but provide a high degree of reliability due to the multiple paths for data that are provided by the large number of redundant links between nodes.
Advantages:
Redundant
Disadvantages:
Expensive

10. How to Diagram a network
Open Visio or Cisco Packet Tracer and follow instructions
Choose a topology.
Make sure to document IPs.
Diagrams should show the logical flow of data, but diagram the physical location of devices.
Requirements
Two Switches
Eight Clients