300-710 · Question #267
When a Cisco FTD device is configured in transparent firewall mode, on which two interface types can an IP address be configured? (Choose two.)
The correct answer is A. Diagnostic C. BVI. In Cisco FTD transparent firewall mode, IP addresses can be configured on the Diagnostic interface for out-of-band management and on the Bridge Virtual Interface (BVI) for Layer 3 processing within a bridge group.
Question
When a Cisco FTD device is configured in transparent firewall mode, on which two interface types can an IP address be configured? (Choose two.)
Options
- ADiagnostic
- BEtherChannel
- CBVI
- DPhysical
- ESubinterface
How the community answered
(35 responses)- A89% (31)
- B3% (1)
- D3% (1)
- E6% (2)
Why each option
In Cisco FTD transparent firewall mode, IP addresses can be configured on the Diagnostic interface for out-of-band management and on the Bridge Virtual Interface (BVI) for Layer 3 processing within a bridge group.
The Diagnostic interface always operates as a Layer 3 routed interface regardless of the FTD's operating mode, making it suitable for out-of-band management and requiring an IP address even in transparent mode.
EtherChannel interfaces, when part of a bridge group in transparent mode, operate at Layer 2 and do not directly have IP addresses assigned.
The Bridge Virtual Interface (BVI) is a logical Layer 3 interface associated with a bridge group in transparent mode, requiring an IP address for management access to the device and for Layer 3 operations for traffic within the bridged segments.
Physical interfaces, when assigned to a bridge group in transparent mode, operate at Layer 2 and do not directly receive an IP address.
Subinterfaces on physical interfaces, when operating in transparent mode, are also typically assigned to bridge groups at Layer 2 without direct IP addresses.
Concept tested: Cisco FTD transparent mode interface IP addressing
Source: https://www.cisco.com/c/en/us/td/docs/security/firepower/70/configuration/guide/fpmc-config-guide-70/configure_interface_settings.html
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