Network segmentation is a cyber hygiene best practice that helps strengthen a business’ security and mitigate damages from a data breach. According to the Cost of Data Breach 2021 report by IBM, data breach costs from 2020 to 2021 went from $3.86 million to $4.24 million, a 10% increase in average.
Network segmentation, also called network partitioning or network isolation, divides a network into multiple subnetworks to improve performance and security. Segmentation aids in traffic flow. Creating barriers in a network can help limit or stop traffic flow, reducing the amount of traffic from unauthorized personnel and making it easier for teams to monitor any suspicious activity.
Some network segmentation benefits include:
• Improved performance. Limiting the number of connected devices reduces network traffic. As a result, network congestion results in faster, more efficient performance.
• Stronger security. Monitoring traffic becomes easier for IT managers because subnetworks are only accessible to their appropriate teams. Suspicious activity can be easier to detect since it may break the pattern of routine activity.
• Limited damage. If cyberattackers manage to breach the network, they are faced with more walls of protection. Segmentation prevents lateral movement since the attacker is restricted to the area they have breached.
• Reduced scope of compliance. Segmentation separates data from other systems, which makes it easier to manage compliance. Compliance requirements will only apply to each specific system rather than the entire network.
Best practices to consider when implementing a network segmentation plan include:
The Armis platform can assist in generating network segmentation policies based on the asset’s needs. These policies can help reduce the exposure and damage of a cyberattack.