Free FCSS_EFW_AD-7.6: FCSS - Enterprise Firewall 7.6 Administrator Exam Questions and Answers
56 verified practice questions for FCSS_EFW_AD-7.6.
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Last updated: September 19, 2026
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Question #1
A company's users on an IPsec VPN between FortiGate A and B have experienced intermittent issues since implementing VXLAN. The administrator suspects that packets exceeding the 1500-byte default MTU are causing the problems. In which situation would adjusting the interface's maximum MTU value help resolve issues caused by protocols that add extra headers to IP packets?
Please select an optionIncorrectCorrect answer: C
Changing the interface MTU only helps when every device along the path supports and is configured for the larger frame size, which is realistic only in a controlled environment you fully manage. Otherwise the oversized frames are dropped somewhere in the path.
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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?
Please select an optionIncorrectCorrect answer: C
Was this answer correct?Question #3
The IT department discovered during the last network migration that all zero phase selectors in phase 2 IPsec configurations impacted network operations. What are two valid approaches to prevent this during future migrations? (Choose two.)
Select 2 answers.
Please select an optionIncorrectCorrect answer: A, C
Zero selectors (0.0.0.0/0) send everything into the tunnel, so define the exact subnets in the phase 2 quick mode selectors, or use a route-based tunnel with a routing protocol that advertises only the intended subnets. Aggregates and interface IPs address redundancy and peering, not traffic selection.
Was this answer correct?Question #4
Refer to the exhibit, which shows a LAN interface connected from FortiGate to two FortiSwitch devices. What two conclusions can you draw from the corresponding LAN interface? (Choose two.)
Select 2 answers.
Please select an optionIncorrectCorrect answer: A, D
Was this answer correct?Question #5
Refer to the exhibit, which shows a corporate network and a new remote office network. An administrator must integrate the new remote office network with the corporate enterprise network. What must the administrator do to allow routing between the two networks?
Please select an optionIncorrectCorrect answer: D
Was this answer correct?Question #6
Refer to the exhibit, which shows a partial enterprise network. An administrator would like the area 0.0.0.0 to detect the external network. What must the administrator configure?
Please select an optionIncorrectCorrect answer: A
Was this answer correct?Question #7
Refer to the exhibit, which shows an enterprise network connected to an internet service provider. The administrator must configure the BGP section of FortiGate A to give internet access to the enterprise network. Which command must the administrator use to establish a connection with the internet service provider?
Please select an optionIncorrectCorrect answer: A
A BGP session with the ISP is formed only after the peer is defined, so config neighbor with the ISP address and remote AS is what establishes the connection. Redistribution and route maps only influence which prefixes are exchanged once the session is up.
Was this answer correct?Question #8
An administrator received a FortiAnalyzer alert that a 1 disk filled up in a day. Upon investigation, they found thousands of unusual DNS log requests, such as JHCMQK.website.com, with no answers. They later discovered that DNS exfiltration was occurring through both UDP and TLS. How can the administrator prevent this data theft technique?
Please select an optionIncorrectCorrect answer: D
IPS signatures for DNS tunneling and exfiltration detect the abnormal query patterns regardless of whether the traffic runs over UDP or DNS over TLS. A DNS filter only rates and blocks domains, so it would miss encrypted tunnelled queries to a legitimate-looking domain.
Was this answer correct?Question #9
An administrator must standardize the deployment of FortiGate devices across branches with consistent interface roles and policy packages using FortiManager. What is the recommended best practice for interface assignment in this scenario?
Please select an optionIncorrectCorrect answer: D
Normalized interface types per platform let FortiManager recognize each device's interfaces by role and name, so the same interface roles and policy package install consistently on different branch models. Metadata variables and Install On do not map interface roles across platforms.
Was this answer correct?Question #10
An administrator wants to scale the IBGP sessions and optimize the routing table in an IBGP network. Which parameter should the administrator configure?
Please select an optionIncorrectCorrect answer: D
Configuring route-reflector-client removes the need for a full IBGP mesh, so sessions scale and the reflector controls which routes are propagated. Multihop and neighbor-group settings affect reachability and configuration reuse, not route table optimization.
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