FCSS_NST_SE-7.6 Practice Questions Preview

Question 1

Single choice

Refer to the exhibit, which shows the partial output of FortiOS kernel slabs.

Which statement is true?

A
The total slab size of the sctp_session slab is 0 kB and is associated with the user space.
B
The total slab size of the ip_session slab is 3600 kB and is associated with the user space.
C
The total slab size of the ip6_session slab is 1300 kB and is associated with the kernel.
D
The total slab size of the tcp_session slab is 7500 kB and is associated with the kernel.

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Correct answerD

Question 2

Multiple choice

Which three common FortiGate-to-collector-agent connectivity issues can you identify using the FSSO real-time debug? (Choose three.)

A
Log is full on the collector agent.
B
Inability to reach IP address of the collector agent.
C
Refused connection. Potential mismatch of TCP port.
D
Mismatched pre-shared password.
E
Incompatible collector agent software version.

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Correct answersB, C, D

Question 3

Single choice

During which phase of IKEv2 does the Diffie-Helman key exchange take place?

A
IKE_Req_INIT
B
Create_CHILD_SA
C
IKE_Auth
D
IKE_SA_INIT

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Correct answerD

Question 4

Multiple choice

Refer to the exhibit, which shows the output o! the BGP database.

Which two statements are correct? (Choose two.)

A
The advertised prefix of 10.20.30.0'24 was configured using the network command.
B
The first four prefixes are being advertised using a legacy route advertisement.
C
The advertised prefix of 10.20.30.0'24 is being advertised through the redistribution of another routing protocol.
D
The output shows all prefixes advertised by all neighbors as well as the local router.

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Correct answersA, D

Question 5

Single choice

Refer to the exhibit.

The exhibit shows a session entry.

Which statement about this TCP session is true?

A
It is a TCP session from 10.9.31.11 to 200.8.57.5.
B
Return traffic to the initiator is sent to 10.9.31.117.
C
It is a TCP session from 10.9.31.117 to 10.1.0.3.
D
Return traffic to the initiator is sent to 10.1.0.254.

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Correct answerB

Question 6

Multiple choice

Which two CLI commands can an administrator use to capture ESP packets for troubleshooting an IPsec tunnel? (Choose two.)

A
diagnose sniffer packet any 'ip proto 50'
B
diagnose debug flow filter addr
C
diagnose sniffer packet any 'udp port 4500'
D
diagnose debug application ike -1

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Correct answersA, C

Question 7

Single choice

Consider the scenario where the server name indication (SNI) does not match either the common name (CN) or any of the subject alternative names (SAN) in the server certificate.

Which action will FortiGate take when using the default settings for SSL certificate inspection?

A
FortiGate uses the SNI from the user's web browser.
B
FortiGate closes the connection because this represents an invalid SSL/TLS configuration.
C
FortiGate uses the first entry listed in the SAN field in the server certificate.
D
FortiGate uses the CN information from the Subject field in the server certificate.

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Correct answerD

Explanation

When FortiGate performs SSL certificate inspection with default settings, it checks if the Server Name Indication (SNI) matches either the Common Name (CN) or any Subject Alternative Name (SAN) in the server certificate. If there is no match, FortiGate does not block the connection; instead, it uses the CN
value from the certificate's subject field to continue web filtering and categorization. This behavior is described in the official Fortinet 7.6.4 Administration Guide: "Check the SNI in the hello message with the CN or SAN field in the returned server certificate: Enable: If it is mismatched, use the CN in the server certificate." This is the default (Enable) mode, which differs from the Strict mode that would block the mismatched connection. By default, this policy ensures service continuity and prevents disruptions due to certificate mismatches, allowing FortiGate to log and inspect based on the CN even when the requested SNI does not match. It provides a balance between connection reliability and the accuracy of filtering by certificate identity, allowing security policies to remain functional without unnecessary blocks. This approach is recommended by Fortinet to maintain usability for end-users while still supporting granular inspection.

References:
FortiGate 7.6.4 Administration Guide: Certificate Inspection SSL/SSH Inspection Profile
Configuration

Question 8

Multiple choice

Refer to the exhibit, which shows the omitted output of a session table entry.

Which two statements are true? (Choose two.)

A
The traffic has been tagged for VLAN 0000.
B
NP7 is handling offloading of this session.
C
The traffic matches Policy ID 1.
D
The session has been offloaded.

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Correct answersB, D

Question 9

Single choice

An administrator needs to verify the current OSPF adjacency status between FortiGate and a neighbor.

Which command should they use?

A
get router info ospf neighbor
B
get router info bgp summary
C
diagnose debug ospf adjacency
D
get router info routing-table all

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Correct answerA

Question 10

Multiple choice

Which shows a partial output of the fssod daemon real-time debug command.

# diagnose debug application fssod -1
# diagnose debug enable
[fssosvr.c:save_result:579] event_id=4768, logon=bobby, domain=FSSO workstation=, ip=10.124.2.90
port=49215, time=1372061722

What two conclusions can you draw Itom the output? (Choose two.)

A
The workstation with IP 10.124.2.90 will be polled frequently using TCP port 445 to see if the user is still logged on.
B
The logon event can be seen on the collector agent installed on Windows.
C
FSSO is using DC agent mode to detect logon events.
D
FSSO is using agentless polling mode to detect logon events.

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Correct answersA, D

Question 11

Multiple choice

Which two statements are true regarding heartbeat messages sent from an FSSO collector agent to FortiGate? (Choose two.)

A
The heartbeat messages can be seen using the command diagnose debug authd fsso list.
B
The heartbeat messages can be seen in the collector agent logs.
C
The heartbeat messages can be seen on FortiGate using the real-lime FSSO debug.
D
The heartbeat messages must be manually enabled on FortiGate.

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Correct answersB, C

Question 12

Single choice

Refer to the exhibit, which shows the output of diagnose sys session list.

If the HA ID for the primary device is 0, what happens if the primary fails and the secondary becomes the primary?

A
The secondary device has this session synchronized; however, because application control is applied,
the session is marked dirty and has to be re-evaluated after failover.
B
Traffic for this session continues to be permitted on the new primary device after failover, without requiring the client to restart the session with the server.
C
The session will be removed from the session table of the secondary device because of the presence of allowed error packets, which will force the client to restart the session with the server.
D
The session state is preserved but the kernel will need to re-evaluate the session because NAT was applied.

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Correct answerB

Question 13

Single choice

In FortiGate HA active-passive mode, which event will cause a failover?

A
Management interface failure
B
Monitored interface link down
C
CPU utilization below threshold
D
Configuration synchronization completed

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Correct answerB

Question 14

Single choice

Which exchange lakes care of DoS protection in IKEv2?

A
Create_CHILD_SA
B
IKE_Auth
C
IKE_Req_INIT
D
IKE_SA_NIT

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Correct answerC

Question 15

Multiple choice

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

Which two conclusions can you draw from the output shown in the exhibit? (Choose two.)

A
FortiGate will drop the expected traffic if it does not arrive within 23 seconds.
B
Clearing the master session has no impact on the expectation session.
C
This is a pinhole session to allow traffic for a TCP protocol that dynamically assigns TCP ports.
D
The session is checked against firewall policy ID 25.

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Correct answersA, C

Question 16

Single choice

Refer to the exhibit.

Which contains a screenshot of some phase 1 settings.

The VPN is not up. To diagnose the issue, the administrator enters the following CLI commands on an SSH session on FortiGate:

Diagnose vpn ike log-filter dst-addr4 10.0.10.1
Diagnose debug application ike -1 However, the IKE real-time debug does not show any output.

Why?

A
The administrator must also run the command diagnose debug enable.
B
The debug shows only error messages. If there is no output, then the phase 1 and phase 2 configurations match.
C
The log-filter setting is incorrect. The VPN traffic does not match this filter.
D
Replace diagnose debug application ike -1 with diagnose debug application ipsec -1.

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Correct answerA

Question 17

Multiple choice

Refer to the exhibit. Partial output of a real-time OSPF debug is shown.

Which two reasons explain why the two FortiGate devices are unable to form an adjacency? (Choose two.)

A
The remote peer has either OSPF cleartext or MD5 authentication configured.
B
There is an OSPF authentication configuration mismatch.
C
The local FortiGate does not have OSPF authentication configured
D
The local FortiGate has either OSPF cleartext or MD5 authentication configured.

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Correct answersB, D

Explanation

To determine the correct reasons for the adjacency failure, we must analyze the standard OSPF real-time debug output (diagnose ip router ospf all enable or diagnose sniffer packet) typically provided in this exam exhibit. Analyze the Debug Output: The debug output in this specific question scenario typically displays an incoming Hello packet line: OSPF: RECV[Hello]:... auth-type 0... "RECV": Indicates the packet is coming from the Remote peer. "auth-type 0": Indicates the Remote peer is sending "Null" (No) authentication.
Analyze the Failure: The adjacency fails because the Local FortiGate is rejecting this packet.

If the Local FortiGate accepts "No Authentication", it would match auth-type 0 and form the adjacency.
Since it is failing (and producing a debug log), the Local FortiGate must be expecting a different authentication type (Type 1 Cleartext or Type 2 MD5). Evaluate the Options:

A. The remote peer has either OSPF cleartext or MD5 authentication configured. Incorrect. The debug

shows auth-type 0 (No Auth) coming from the remote peer. B. There is an OSPF authentication configuration mismatch. Correct. One side is sending "No Auth" (Remote), and the other expects
"Auth" (Local). This is a definition of a mismatch.
C. The local FortiGate does not have OSPF authentication configured. Incorrect. If the Local unit had "No Auth" configured, it would match the Remote's auth-type 0, and the adjacency would come up. The failure implies the Local unit does have auth configured.
D. The local FortiGate has either OSPF cleartext or MD5 authentication configured. Correct.
Because the Local unit is rejecting the "No Auth" packet from the remote peer, it confirms that the Local unit has authentication enabled (expecting Type 1 or 2). Conclusion: The breakdown of the OSPF negotiation shows that the Remote peer is sending no authentication (Type 0), while the Local FortiGate expects authentication, resulting in a mismatch.
References:
FortiGate Security 7.6 Study Guide (OSPF Troubleshooting): "Authentication mismatch is a common cause of OSPF adjacency failure. Debug commands (diagnose ip router ospf all enable) reveal the auth-type received versus expected." FortiGate CLI Reference: auth-type 0 = Null (None), auth-type 1 = Simple (Cleartext), auth-type 2 = MD5.

Question 18

Multiple choice

Which three common FortiGate-to-collector-agent connectivity issues can you identify using the FSSO real-time debug? (Choose three.)

A
The SSL certificate used for FSSO over SSL has expired.
B
The connection was refused. There may be a mismatch of the TCP port.
C
FortiGate cannot reach the IP address of the collector agent.
D
The pro-shared key does not match
E
The group filters do not match.

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Correct answersB, C, D

Explanation

The diagnose debug authd fsso server command is the primary tool for troubleshooting communication between the FortiGate and the FSSO Collector Agent. This debug output reveals the status of the connection and the reasons for failure.

The three most common connectivity issues identified by this debug are: FortiGate cannot reach the IP address of the collector agent (Option C): The debug will show connection timeouts or "host unreachable" errors if the Layer 3 connectivity is missing.

The connection was refused / Port mismatch (Option B): If the FortiGate can reach the IP but the Collector Agent is not listening on the specified port (default 8000), the debug will display "Connection refused." This often happens if the port configured on the FortiGate does not match the listening port on the agent.

The pre-shared key does not match (Option D): If the IP and Port are correct, the next step is authentication. If the password configured on the FortiGate does not match the one on the Collector Agent, the debug will explicitly show an "Authentication failed" or "password mismatch" error during the handshake.

Note on other options:
Option A (SSL) is less common than basic connectivity/auth mismatches.
Option E (Group filters) relates to user processing logic, which occurs after connectivity is established.

References:
FortiGate Security 7.6 Study Guide (FSSO Troubleshooting): "Troubleshooting FSSO... Check
connectivity (IP/Port) and authentication (Password)."