What will best enhance security of a production online system while minimizing the impact for the existing network?

Question

Options

• ALayer 2 interfaces
• Bactive / active high availability (HA)
• CVirtual wire
• Dvirtual systems

• A
  4% (1)
• B
  7% (2)
• C
  79% (22)
• D
  11% (3)

Explanation

Virtual Wire mode inserts a firewall transparently between two network segments - a true "bump in the wire" - requiring no IP address assignment, no routing changes, and no reconfiguration of adjacent devices. This makes it the ideal choice when you need to add inline security inspection to a live production network without disrupting existing traffic flows or topology.

Why the distractors are wrong:

• A. Layer 2 interfaces - These still require VLAN/switching configuration changes and integrate into the Layer 2 domain, meaning they do affect the existing network design.
• B. Active/Active HA - This addresses availability and redundancy, not transparent insertion. It doesn't minimize network impact when deploying security; it minimizes downtime.
• D. Virtual systems (vsys) - These are logical partitions within a single firewall for multi-tenancy or segmentation purposes. They don't address how the firewall is deployed into the network.

Memory tip: Think of Virtual Wire as a "security X-ray machine at the airport" - traffic passes straight through, the travelers (packets) don't change their path, and the infrastructure around them stays the same. If the question mentions production, existing network, and minimize impact together, that combination almost always points to Virtual Wire.

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