Free Cisco 300-710 Exam Dumps September 2026

Transparent mode is a firewall configuration in which the firewall acts as a ''bump in the wire'' or a ''stealth firewall'' and is not seen as a router hop to connected devices. In transparent mode, the firewall can forward traffic at both layer 2 and layer 3 for the same subnet, as it does not perform any address translation or routing. The firewall inspects the traffic and applies security policies based on the source and destination IP addresses, ports, and protocols.Transparent mode is useful when you want to deploy a firewall without changing the existing network topology or addressing scheme1.

To filter traffic between multiple subnets, the engineer must implement the firewall in routed mode. In routed mode, the firewall operates as a Layer 3 device, capable of routing traffic between different IP subnets. This mode is appropriate for filtering traffic between LAN, DMZ, and WAN subnets.

Steps to configure routed mode:

Access the firewall's management interface.

Configure interfaces for each subnet (LAN, DMZ, WAN) with appropriate IP addresses and network masks.

Define security zones and apply access control policies to filter traffic as required.

This ensures that the firewall can inspect and route traffic between the different subnets, providing the necessary security and control.

To deploy a Cisco FTD device that meets the requirements of the question, the engineer must use transparent mode with a management interface. Transparent mode is a firewall configuration in which the FTD device acts as a ''bump in the wire'' or a ''stealth firewall'' and is not seen as a router hop to connected devices.In transparent mode, the FTD device can examine traffic without requiring network changes that will disrupt end users, such as changing IP addresses or routingconfigurations1. A management interface is a dedicated interface that is used for managing the FTD device and separating management traffic from data traffic.A management interface can be configured to allow SSH access for remote administration, which is more secure than Telnet2.

The other options are incorrect because:

Routed mode is a firewall configuration in which the FTD device acts as a router and performs address translation and routing for connected networks.Routed mode requires network changes that may disrupt end users, such as changing IP addresses or routing configurations1. A diagnostic interface is a special interface that is used for troubleshooting and capturing traffic on the FTD device. A diagnostic interface does not separate management traffic from data traffic or allow SSH access for remote administration.

Transparent mode with a data interface does not meet the requirement of separating management traffic from data traffic. A data interface is a regular interface that is used for passing and inspecting traffic on the FTD device.A data interface does not allow SSH access for remote administration2.

Routed mode with a bridge virtual interface (BVI) does not meet the requirement of examining traffic without requiring network changes that will disrupt end users. A BVI is a logical interface that acts as a container for one or more physical or logical interfaces that belong to the same layer 2 broadcast domain. A BVI allows the FTD device to route between different bridge groups on the same security module/engine. However, routed mode still requires network changes that may disrupt end users, such as changing IP addresses or routing configurations.

To ensure high availability of internet access when deploying a pair of Cisco Secure Firewall Threat Defense (FTD) devices managed by Cisco Secure Firewall Management Center (FMC), the following features must be deployed:

Route Tracking:This feature monitors the reachability of a specified target (such as an external IP address) through the configured routes. If the route to the target is lost, the FTD can dynamically adjust the routing to use an alternate path, ensuring continuous internet access.

SLA Monitor:Service Level Agreement (SLA) monitoring works alongside route tracking to continuously verify the status and performance of the internet links. If the SLA for one of the ISP links fails (indicating the link is down or underperforming), the FTD can switch traffic to the secondary ISP link.

Steps to configure:

In FMC, navigate toDevices > Device Management.

Select the FTD device and configure route tracking to monitor the ISP links.

Configure SLA monitors to continuously check the health and performance of the internet circuits.

These configurations ensure that internet access remains available to users even if one of the ISPs goes down.