What is an advantage of using SDN versus traditional networking when it comes to security?
A. SDN devices communicate with each other to establish a security policy, and in traditional networking, devices communicate upstream to a central location to establish a security policy.
B. SDN creates a unified control point making security policies consistent across all devices, and traditional networking must be configured device by device, leaving room for error.
C. SDN security is managed near the perimeter of the network with firewalls, VPNs, and IPS, and traditional networking security policies are created based on telemetry data.
D. SDN exposes an API to configure locally per device for security policies, and traditional networking uses northbound API for network admin interface for configuring security policies.
Answer (2)
The advantage of using Software-Defined Networking (SDN) compared to traditional networking when it comes to security is highlighted in option (B): SDN creates a unified control point making security policies consistent across all devices, whereas traditional networking must be configured device by device, leaving room for error.
Here's why this is advantageous:
Unified Control Point : SDN centralizes the management of network resources. It allows for the creation of a control plane that can uniformly enforce security policies across the entire network. This centralization minimizes discrepancies and inefficiencies.
Consistency and Efficiency : With a single point of control, SDN ensures that security policies are consistently applied across all the network devices. This reduces the chance of errors that can occur when setting up each device individually, as is common in traditional networking.
Flexibility and Scalability : SDN allows for the rapid adaptation to new security threats and updates to security policies across the network, without having to manually adjust each network device.
Automation and Reduced Complexity : SDN can automate security policy management through programmable interfaces, reducing the complexity involved in managing network security settings. This is a stark contrast to traditional networking where manual configuration can lead to human errors and inconsistencies.
In summary, the centralized nature of SDN aids in maintaining a consistent, efficient, and adaptable security posture in the networking environment.
The chosen option is (B) because SDN provides a unified control point for security policies across all devices, which is more efficient than the device-by-device configuration required in traditional networking, reducing the chances of errors. This centralized approach enhances consistency and flexibility in implementing security measures. Overall, it simplifies security management in networks.
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