Network Segment


A network segment is a portion of a computer network that is separated from the rest of the network by devices like switches, bridges, or routers. It consists of a group of devices that communicate directly with one another and operate within the same collision and broadcast domains. Segments help to manage network traffic, improve performance, and enhance security by limiting the scope of data communication.

Key Takeaways

  1. A network segment is a portion of a computer network, typically separated by switches, routers, or bridges, that helps to manage traffic, improve performance, and enhance security.
  2. Network segments can be created using various techniques such as subnetting, virtual LANs (VLANs), or physical separation, allowing for the isolation of specific groups of devices and improved control over their access to network resources.
  3. By breaking a network into smaller segments, administrators can reduce congestion and improve network efficiency, as well as increase security through the implementation of segment-specific policies, access control, or network monitoring tools.


The term “Network Segment” is vital in the realm of technology as it refers to a specific portion of a larger computer network, typically separated by switches, routers, or bridges, to enhance performance, organization, and security.

Dividing a network into segments enables better control over data traffic, reduces congestion and collisions, and allows for more efficient allocation of resources.

It also aids in implementing and managing security measures, as it limits the scope of unauthorized access or breaches, safeguarding critical information.

In essence, network segmentation streamlines network management, optimizes performance, and bolsters the overall security of an organization’s infrastructure.


A network segment serves as a fundamental element in networking infrastructure, enabling efficient communication and data flow within large networks. The primary purpose of a network segment is to divide a computer network into smaller and more manageable parts to reduce network traffic, optimize performance, and enhance security. This efficient division of interconnected devices into logical units ensures that information can be more effectively transferred between specific devices without burdening the entire network.

Additionally, the segmentation helps in simplifying network administration tasks, making it effortless to monitor, troubleshoot, and manage individual sections while minimizing the impact on other users. As each segment acts as a separate communication channel, it also allows for greater flexibility when it comes to implementing various security measures. Network administrators have the capability to establish and enforce access controls, monitor traffic, and ensure data confidentiality on a per-segment basis.

This ultimately reduces the risk of unauthorized access and data breaches by isolating critical systems and sensitive information from the larger network. Furthermore, by containing the spread of network issues, network segments can protect other parts of the network from being impacted by incidents like hardware failures, excessive traffic, or broadcast storms. Overall, network segmentation is an indispensable strategy for optimizing network performance, enhancing security measures, and streamlining management tasks.

Examples of Network Segment

A network segment refers to a portion of a computer network that is separated from the rest of the network by devices such as switches, routers, or bridges. Network segments help improve network performance, manageability, and security. Here are three real-world examples of network segments:

Corporate Companies: In a large company, network segments can be created to separate different departments or teams, such as Human Resources, Finance, and IT departments. This not only allows for the efficient management of network resources but also enhances security by restricting unauthorized access to sensitive information.

College Campus Network: Educational institutions often use network segments to separate different areas of their networks, such as student dormitories, administrative offices, and academic buildings. This not only makes it easier to manage and prioritize bandwidth usage but also helps protect the more sensitive areas of the network from potential breaches.

Public Wi-Fi Networks: In places like hotels, cafes, and airports, public Wi-Fi networks are often segmented from the main, private networks of the organization. This can provide a separate, limited network to guests and visitors, allowing them to access the internet without exposing the organization’s critical resources and data.

Network Segment FAQ

1. What is a network segment?

A network segment is a portion of a computer network that is separated from the rest of the network by devices such as switches, routers, or bridges. Network segments help manage network traffic by reducing collisions, increasing security, and improving overall performance.

2. Why are network segments important?

Network segments are important because they allow for better control and organization of a network. By breaking a network into smaller segments, administrators can isolate and troubleshoot network issues more effectively, which helps improve overall network uptime and performance.

3. How are network segments created?

Network segments can be created using various methods, such as physical segmentation (using switches or routers) or logical segmentation (using virtual LANs (VLANs) or subnetting). These methods allow for the separation of different layers and types of network traffic, ensuring efficient and secure communication.

4. What devices are commonly used to create network segments?

Common devices used to create network segments include switches, routers, and bridges. These devices control network traffic, ensuring proper communication between various devices on the network and creating a clear path for data to flow between segments.

5. What are the benefits of using network segments?

There are several benefits to using network segments, including improved security, reduced network congestion, and better network performance. In addition, network segments can help simplify network management and troubleshooting, as well as providing better control over network resources.

Related Technology Terms

  • Subnet
  • Bridge
  • Router
  • Switch
  • VLAN

Sources for More Information


About The Authors

The DevX Technology Glossary is reviewed by technology experts and writers from our community. Terms and definitions continue to go under updates to stay relevant and up-to-date. These experts help us maintain the almost 10,000+ technology terms on DevX. Our reviewers have a strong technical background in software development, engineering, and startup businesses. They are experts with real-world experience working in the tech industry and academia.

See our full expert review panel.

These experts include:


About Our Editorial Process

At DevX, we’re dedicated to tech entrepreneurship. Our team closely follows industry shifts, new products, AI breakthroughs, technology trends, and funding announcements. Articles undergo thorough editing to ensure accuracy and clarity, reflecting DevX’s style and supporting entrepreneurs in the tech sphere.

See our full editorial policy.

More Technology Terms

Technology Glossary

Table of Contents