Advantages and disadvantages of Computer Network Topology

1. star topology

A star topology is composed of a central node and a site connected to a central node through a point-to-point communication link.

The star topology has the following advantages:

(1) simple control.

(2) Easy Fault Diagnosis and isolation.

(3) convenient services.

Disadvantages of the star topology:

(1) Considerable cable length and installation workload.

(2) the burden on the central node is heavy, leading to bottlenecks.

(3) The distribution and processing capabilities of each site are low.

2. bus topology

The bus topology uses a channel as the transmission media. All sites are connected directly to this public transmission media through the corresponding hardware interfaces. This public transmission media is called the bus.

Advantages of the bus topology:

(1) The number of cables required for the bus structure is small.

(2) The bus has a simple structure, is passive, and has high reliability.

(3) It is easy to expand and increase or decrease users.

Disadvantages of the bus topology:

(1) The transmission distance of the bus is limited, and the communication range is limited.

(2) It is difficult to diagnose and isolate faults.

(3) distributed protocols do not guarantee the timely transmission of information and do not provide real-time functions.

3. ring topology

A ring topology consists of links of sites and connected sites.

Advantages of ring topology:

(1) Short cable length.

(2) When adding or removing workstation, you only need simple connection operations.

(3) optical fiber available.

Disadvantages of ring topology:

(1) A node failure may cause a network-wide fault.

(2) difficult fault detection.

(3) The media access control protocols in the ring topology adopt the token transfer-to-chamber delivery method. When the load is low, the channel utilization is relatively low.

4. tree topology

The tree topology evolves from the bus topology, and is like an inverted tree. The top is the root of the tree, and the branches are under the root of the tree. Each branch can be another branch.

Advantages of tree topology:

(1) easy to expand.

(2) fault isolation is easier.

Disadvantages of tree topology:

Each node is highly dependent on the root.