https://www.cisco.com/c/en/us/td/docs/security/asa/asa910/configuration/ firewall/asa-910-firewall-config/access-sfr.html

Inline tap monitor-only mode (ASA inline)—In an inline tap monitor-only deployment, a copy of the traffic is sent to the ASA FirePOWER module, but it is not returned to the ASA. Inline tap mode lets you see what the ASA FirePOWER module would have done to traffic, and lets you evaluate the content of the traffic, without impacting the network. However, in this mode, the ASA does apply its policies to the traffic, so traffic can be dropped due to access rules, TCP normalization, and so forth.

The default action setting in a Cisco FTD Access Control Policy determines how the system handles and logs traffic that is not handled by any other access control configuration. The default action can block or trust all traffic without further inspection, or inspect traffic for intrusions and discovery data3.

The Trust All Traffic option allows all traffic from an undefined application to pass without Snort inspection. This option also disables Security Intelligence filtering, file and malware inspection, and URL filtering for all traffic handled by the default action. This option is useful when you want to minimize the performance impact of access control on your network3.

The other options are incorrect because:

The Inherit from Base Policy option inherits the default action setting from the base policy. The base policy is the predefined access control policy that you use as a starting point for creating your own policies. Depending on which base policy you choose, the inherited default action setting can be different3.

The Network Discovery Only option inspects all traffic for discovery data only. This option enables Security Intelligence filtering for all traffic handled by the default action, but disables file and malware inspection, URL filtering, and intrusion inspection. This option is useful when you want to collect information about your network before you configure access control rules3.

The Intrusion Prevention option inspects all traffic for intrusions and discovery data. This option enables Security Intelligence filtering, file and malware inspection, URL filtering, and intrusion inspection for all traffic handled by the default action. This option provides the most comprehensive protection for your network, but also has the most performance impact3.

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.

The Encrypted Visibility Engine (EVE) in Cisco Secure Firewall Management Center is enabled under the SSL tab of an access control policy. EVE provides visibility into encrypted traffic, allowing the firewall to detect threats even when traffic is encrypted.

Steps to enable EVE:

Navigate to the access control policy in FMC.

Go to theSSLtab.

Enable Encrypted Visibility Engine (EVE) to analyze encrypted traffic.

This configuration helps in identifying and mitigating threats within encrypted traffic without the need for full decryption.