[Crawl-Date: 2026-04-29]
[Source: DataJelly Visibility Layer]
[URL: https://griffinitgroup.com/it-glossary/network-segmentation]
---
title: What Is Network Segmentation?
description: The practice of dividing a computer network into smaller, isolated subnetworks (segments or VLANs) to improve security, performance, and manageability. Ea...
url: https://griffinitgroup.com/it-glossary/network-segmentation
canonical: https://griffinitgroup.com/it-glossary/network-segmentation
og_title: What Is Network Segmentation?
og_description: The practice of dividing a computer network into smaller, isolated subnetworks (segments or VLANs) to improve security, performance, and manageability. Ea...
og_image: https://griffinitgroup.com/griffin-logo-og.png
twitter_card: summary_large_image
twitter_image: https://griffinitgroup.com/griffin-logo-og.png
---

# What Is Network Segmentation?
> The practice of dividing a computer network into smaller, isolated subnetworks (segments or VLANs) to improve security, performance, and manageability. Ea...

---

Security

Intermediate
## What Is Network Segmentation?
What Is Network Segmentation? Network Segmentation the practice of dividing a computer network into smaller, isolated subnetworks (segments or VLANs) to improve security, performance, and manageability. Each segment enforces its own access policies, limiting lateral movement if one segment is compromised.

## Why This Matters for Your Business
A flat network where every device can communicate with every other device is an attacker's dream — one compromised workstation gives access to servers, printers, cameras, and everything else. Network segmentation contains breaches to a single segment, protects sensitive systems like payment processing and patient records, and is a requirement for compliance frameworks like PCI-DSS and HIPAA.

## Related Security Terms

[Beginner
## 2FA (Two-Factor Authentication)
A security process that requires users to provide two different authentication factors to verify their identity. This typically combines something you know (password) with something you have (phone) or something you are (fingerprint).](https://griffinitgroup.com/it-glossary/2fa) [Intermediate
## DLP (Data Loss Prevention)
A strategy and set of tools to prevent sensitive data from being lost, misused, or accessed by unauthorized users. DLP software detects potential data breaches and prevents them by monitoring, detecting, and blocking sensitive data.](https://griffinitgroup.com/it-glossary/dlp) [Intermediate
## EDR (Endpoint Detection and Response)
A cybersecurity solution that continuously monitors and responds to potential threats on endpoints like computers and servers. EDR tools detect, investigate, and respond to suspicious activities in real-time.](https://griffinitgroup.com/it-glossary/edr) [Intermediate
## Encryption
The process of converting data into a coded format that can only be read by someone with the correct decryption key. Encryption protects sensitive information from unauthorized access.](https://griffinitgroup.com/it-glossary/encryption)

[NetworkPrevious](https://griffinitgroup.com/it-glossary/network) [All Terms](https://griffinitgroup.com/it-glossary) [NGFW (Next-Generation Firewall)Next](https://griffinitgroup.com/it-glossary/ngfw)

## Need Help With Security?

Our team can help you understand and implement the right technology solutions for your business. Get expert guidance from local IT professionals.

[Schedule a Consultation](https://griffinitgroup.com/contact) [Call (289) 667-4000](tel:+12896674000)

## Discovery & Navigation
> Semantic links for AI agent traversal.

* [Home](https://griffinitgroup.com/)
* [About](https://griffinitgroup.com/about)
* [Services](https://griffinitgroup.com/services)
* [Blog](https://griffinitgroup.com/blog)
* [Contact](https://griffinitgroup.com/contact)
* [IT Glossary](https://griffinitgroup.com/it-glossary)
* [(289) 667-4000](tel:+12896674000)
* [info@griffinitgroup.com](mailto:info@griffinitgroup.com)
* [Site Map](https://griffinitgroup.com/sitemap)
* [Cybersecurity](https://griffinitgroup.com/small-business-cybersecurity)
* [Managed IT Services](https://griffinitgroup.com/managed-it-services-niagara)
* [Field Services](https://griffinitgroup.com/field-it-services-niagara)
* [Network Infrastructure](https://griffinitgroup.com/network-infrastructure-niagara)
* [Niagara Community Support](https://griffinitgroup.com/niagara-community-support)
* [Thorold](https://griffinitgroup.com/thorold-it-support)
* [Managed IT](https://griffinitgroup.com/managed-it-services-thorold)
* [St. Catharines](https://griffinitgroup.com/st-catharines-it-support)
* [Managed IT](https://griffinitgroup.com/managed-it-services-st-catharines)
* [Welland](https://griffinitgroup.com/welland-it-support)
* [Managed IT](https://griffinitgroup.com/managed-it-services-welland)
* [Niagara Falls](https://griffinitgroup.com/niagara-falls-it-support)
* [Managed IT](https://griffinitgroup.com/managed-it-services-niagara-falls)
* [Fort Erie](https://griffinitgroup.com/fort-erie-it-support)
* [Managed IT](https://griffinitgroup.com/managed-it-services-fort-erie)
* [Grimsby](https://griffinitgroup.com/grimsby-it-support)
* [Managed IT](https://griffinitgroup.com/managed-it-services-grimsby)
* [NOTL](https://griffinitgroup.com/niagara-on-the-lake-it-support)
* [Managed IT](https://griffinitgroup.com/managed-it-services-niagara-on-the-lake)
* [Ajax](https://griffinitgroup.com/ajax-it-support)
* [Managed IT](https://griffinitgroup.com/managed-it-services-ajax)
* [Burlington](https://griffinitgroup.com/burlington-it-support)
* [Managed IT](https://griffinitgroup.com/managed-it-services-burlington)
* [Hamilton](https://griffinitgroup.com/hamilton-it-support)
* [Managed IT](https://griffinitgroup.com/managed-it-services-hamilton)
* [Oakville](https://griffinitgroup.com/oakville-it-support)
* [Managed IT](https://griffinitgroup.com/managed-it-services-oakville)
* [Explore Our Full CapabilitiesIT Service Catalogue — 220+ Services Across 39 Domains](https://griffinitgroup.com/it-service-catalogue)