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Microsegmentation refers to a security method involving the isolation of secure zones in a data center or cloud environment. This enables IT administrators to gain more granular control over applications and workloads.

Using microsegmentation architecture, each security zone gets its own services, custom-designed to suit the needs of that specific segment of the network. When implementing a?zero-trust?security architecture, microsegmentation can be particularly useful.?

Administrators use network microsegmentation to cordon off specific areas of the network¡ªor even individual devices¡ªand then set up a zero-trust architecture for that specific section of the network using a segmentation gateway, which monitors people and data as they enter while using security measures to make sure they qualify to enter.

Traditional network segmentation involves dividing a network into smaller segments, often called subnets, with each one becoming its own network. This makes it possible for administrators to manage how traffic flows between all of the subnets. Traditional segmentation provides network protection by allowing administrators to set up policies tailored for each subnet. The more specific the security policy to each segment, the better able it is to detect and respond to threats that target the section as an attack surface.

With traditional network segmentation, you use firewalls, virtual local-area networks (VLANs), and intrusion prevention systems (IPS) to separate each segment. Data going from one subnet to another may get filtered through a firewall, which detects and prevents the intrusion of threats before allowing the data to pass. With a VLAN, a local-area network (LAN) is divided into smaller sections, allowing you the freedom to provide unique protection for each section. With an IPS, each segment of the network is monitored continually as the system proactively looks out for malicious incidents.

A network segmentation approach is limited, however, because it only focuses on north-south traffic, which is traffic that goes from the client to the server. As data comes from outside the network, network segmentation is able to examine and filter it. But if malicious activity is happening within your network, it could go undetected with traditional segmentation.?

One of the primary benefits of microsegmentation is it can apply security protocols to traffic that is already within your network, moving east-west between internal servers.

If you want to achieve true application segmentation, microsegmentation is a good choice. It allows you to isolate the workloads of individual applications. With this in place, you can prevent the lateral movement of threats, trapping them within the isolated segment that houses the application the threat targeted.

Microsegmentation also provides superior visibility into the network. Because you can isolate individual segments and monitor each one using a specific dashboard, you can customize your alert and alert management systems on a segment-by-segment basis. You can, for example, apply microsegmentation to a specific device or set of devices based on who will be using them, which could provide granular visibility into the activity happening within each component that has been microsegmented.

For security purposes, microsegmentation allows you to create more flexible solutions because you can microsegment individual workloads and then apply security policies specifically designed to keep them safe. If a threat tries to invade your network, microsegmentation can help you detect it faster as well.?

Each segment can have its own security ¡°wall¡± around it. As the threat attempts to move from segment A to segment B, it can be detected by both the protections around segment A as it tries to leave and those around segment B as it tries to enter. For example, a system may employ a highly sensitive database workload that contains the credit card information of thousands of customers. Using microsegmentation architecture, you can apply extra security measures to protect the data held within.