1.5 Topologies overview: BUS, Star, Ring, Hybrid

 

1.5 Network Topology

Network topology is the physical or logical arrangement of computers, cables, and other network devices in a network.

It shows how devices are connected and how data travels between them.

A LAN Topology is a cabling structure or pattern of computers in a local area.

 

Types of Network Topology

i. Bus Topology
ii. Star Topology
iii. Ring Topology
iv. Hybrid Topology

 

 

Bus Topology

Bus topology is a network topology in which all computers and devices are connected to a single main cable called a bus.

The cable has terminators at both ends to prevent signal loss and ensure proper data transmission.

When the bus topology has exactly two endpoints, it is called a Linear Bus Topology.

 

Features of Bus Topology

i. Requires less cable than many other topologies
ii. Cost-effective and economical
iii. Easy to understand and install
iv. Suitable for small networks
v. Easy to expand
vi. Terminators are required at both ends of the cable

 

Advantages of Bus Topology

• Low installation cost
• Requires less cable
• Easy to extend the network

 

Disadvantages of Bus Topology

• Failure of the main cable can affect the entire network
• Network performance decreases as more devices are added
• Troubleshooting can be difficult

 

Star Topology

Star topology is a network topology in which all computers and devices are connected to a central device called a hub or switch through separate cables.

The hub or switch controls the communication between devices in the network.

 

Features of Star Topology

i. Provides fast performance and low network traffic
ii. Easy to install, troubleshoot, and modify
iii. Failure of one node does not affect other nodes
iv. Easy to add or remove devices
v. Widely used in modern networks

 

Advantages of Star Topology

• Fast and efficient communication
• Easy network management
• Easy fault detection
• Failure of one device does not affect the entire network

 

Disadvantages of Star Topology

• Requires more cable than bus topology
• Depends on the central hub or switch
• Failure of the hub or switch can affect the entire network

Ring Topology

Ring topology is a network topology in which each computer is connected to the next computer, and the last computer is connected to the first, forming a closed loop or ring.

Data travels from one computer to another in a sequential manner around the ring.

 

Features of Ring Topology

i. Forms a closed loop network
ii. Each computer has equal responsibility in data transmission
iii. Data is transmitted sequentially from one device to another
iv. Network performance is less affected by high traffic
v. Can support a large number of nodes using repeaters

 

Advantages of Ring Topology

• Equal access for all devices
• Handles network traffic efficiently
• Easy to expand the network

 

Disadvantages of Ring Topology

• Failure of one node or cable can affect the entire network
• Troubleshooting can be difficult
• Adding or removing devices may disrupt the network

 

Hybrid Topology

 

Hybrid topology is a network topology formed by combining two or more different topologies, such as star, bus, and ring, into a single network.

It combines the advantages of different topologies to provide better flexibility, reliability, and performance.

 

Features of Hybrid Topology

i. Allows easy expansion of the network
ii. Supports the addition of new devices and technologies
iii. Reduces the risk of complete network failure
iv. Combines the advantages of different topologies
v. Provides better speed and efficiency

 

Advantages of Hybrid Topology

• Flexible and scalable
• Reliable network performance
• Easy to expand
• Better fault tolerance

 

Disadvantages of Hybrid Topology

• Complex network design
• Higher installation cost
• More difficult to manage than simple topologies