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  1. Home
  2. Fortinet Certification
  3. FCSS_EFW_AD-7.6 Exam
  4. Fortinet.FCSS_EFW_AD-7.6.v2025-12-19.q21 Dumps
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Question 6

How will configuring set tcp-mss-sender and set tcp-mss-receiver in a firewall policy affect the size and handling of TCP packets in the network?

Correct Answer: B
The set tcp-mss-sender and set tcp-mss-receiver commands in a firewall policy allow an administrator to adjust the Maximum Segment Size (MSS) of TCP packets.
This setting controls the largest payload size that a device can handle in a single TCP segment, ensuring that packets do not exceed the allowed MTU (Maximum Transmission Unit) along the network path.
# set tcp-mss-sender adjusts the MSS value for outgoing TCP traffic.
# set tcp-mss-receiver adjusts the MSS value for incoming TCP traffic.
This helps prevent issues with fragmentation and MTU mismatches, improving network performance and avoiding retransmissions.
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Question 7

Refer to the exhibit, which shows a partial troubleshooting command output.

An administrator is extensively using IPsec on FortiGate. Many tunnels show information similar to the output shown in the exhibit.
What can the administrator conclude?

Correct Answer: B
The diagnose vpn tunnel list name Hub2Spoke1 command output provides key information about the offloading status of an IPsec VPN tunnel to the Network Processing Unit (NPU).
# npu_flag=20:
# This flag indicates that both inbound and outbound IPsec Security Associations (SAs) have been offloaded to the NPU, meaning the VPN traffic is processed in hardware instead of the CPU.
# npu_rgwy=10.10.2.2 and npu_lgwy=10.10.1.1:
# These IPs represent the remote gateway (rgwy) and local gateway (lgwy), confirming that the tunnel is successfully offloaded.
# npu_selid=1:
# This value means the session selector for the NPU offloaded SA is active.
Since both inbound and outbound SAs are offloaded, the administrator can conclude that the FortiGate NPU is handling IPsec encryption and decryption efficiently, reducing CPU load and improving VPN performance.
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Question 8

Refer to the exhibit, which shows a network diagram showing the addition of site 2 with an overlapping network segment to the existing VPN IPsec connection between the hub and site 1.

Which IPsec phase 2 configuration must an administrator make on the FortiGate hub to enable equal-cost multi-path (ECMP) routing when multiple remote sites connect with overlapping subnets?

Correct Answer: A
When multiple remote sites connect to the same hub using overlapping subnets, FortiGate needs to determine which route should be used for traffic forwarding. The route-overlap setting in IPsec Phase 2 allows FortiGate to handle this scenario by deciding whether to keep the existing route (use-old) or replace it with a new route (use-new).
In an ECMP (Equal-Cost Multi-Path) routing setup, both routes should be retained and balanced, but FortiGate does not support ECMP directly over overlapping routes in IPsec Phase 2. Instead, an administrator must decide which connection takes precedence using route-overlap settings.
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Question 9

Refer to the exhibit, which shows a revision history window in the FortiManager device layer.

The IT team is trying to identify the administrator responsible for the most recent update in the FortiGate device database.
Which conclusion can you draw about this scenario?

Correct Answer: D
The Configuration Revision History window in FortiManager shows that the most recent configuration change (ID 10) was created by script_manager with the action Retrieved.
Since script_manager is a system-level script execution user, the IT team needs to find who actually triggered this script. This can be done by:
# Checking the FortiManager system logs for script execution events.
# Using the type=script filter to locate the administrator associated with the script execution.
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Question 10

An administrator is setting up an ADVPN configuration and wants to ensure that peer IDs are not exposed during VPN establishment.
Which protocol can the administrator use to enhance security?

Correct Answer: A
In ADVPN (Auto-Discovery VPN) configurations, security concerns include protecting peer IDs during VPN establishment. Peer IDs are exchanged in the IKE (Internet Key Exchange) negotiation phase, and their exposure could lead to privacy risks or targeted attacks.
# IKEv2 encrypts peer IDs, making it more secure compared to IKEv1, where peer IDs can be exposed in plaintext in aggressive mode.
# IKEv2 also provides better performance and flexibility while supporting dynamic tunnel establishment in ADVPN.
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