Which limitation of CoreXL is mitigated by using Multi-Queue?

The correct answer highlights a significant enhancement that Multi-Queue offers within the CoreXL architecture. CoreXL is designed to improve performance by allowing multiple CPU cores to process firewall traffic in parallel. However, a limitation arises when each network interface card (NIC) is tied to a single traffic queue, which can lead to suboptimal use of available CPU resources.

By implementing Multi-Queue, each NIC can support multiple traffic queues, enabling the distribution of data processing across several CPU cores. This means that multiple CPU cores can handle incoming packets concurrently, significantly improving the throughput and performance of the firewall. This is especially beneficial in environments with high traffic loads, where a single queue could become a bottleneck, leading to latency and decreased efficiency.

In contrast, situations described in other options do not reflect the performance enhancement that Multi-Queue provides. For example, having no traffic queue or multiple NICs sharing one queue does not enhance the distribution of workload across CPU cores, which is the key advantage of Multi-Queue in addressing CoreXL limitations. Thus, the ability to have several traffic queues per NIC managed by multiple CPU cores is a crucial feature that optimizes resource utilization and enhances traffic handling capabilities in security appliance deployments.