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Fortinet FCSS_NST_SE-7.6

Fortinet NSE 6 - Network Security 7.6 Support Engineer

Verified practice questions with detailed answers, clear explanations, and community discussion.

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  • 10 days ago

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Question 1 of 70

The local OSPF router is unable to establish adjacency with a peer.

Which two things should the administrator do to troubleshoot the issue? (Choose two.)

Answer choices
Show answer

Correct answers: B, D

OSPF neighbors on a broadcast or point-to-point link must use addresses in the same IP subnet so that Hello packets can be exchanged directly. OSPF packets use IP protocol 89, not TCP or UDP, so any firewall, ACL, or policy blocking protocol 89 prevents adjacency formation. A static route is not required for directly connected OSPF neighbors. TCP port 179 applies to BGP sessions, not OSPF.

Community votes

2 votes

BDSuggested

100%

Question 2 of 70

Refer to the exhibit.

Partial output of the real-time LDAP debug is shown.

Exam fcss-nst-se-7-6: Image 1

Which two actions can the administrator take to resolve this issue? (Choose two.)

Answer choices
Show answer

Correct answers: A, B

An active AD account with valid credentials is required for LDAP authentication to succeed. The debug shows that FortiGate searches for the sAMAccountName jsmith but receives no usable DN and ends with an authentication denial. This can occur when the account is disabled or when the supplied username or password is incorrect. Group membership is not required merely to locate and authenticate the user, and jsmith is the appropriate value when the LDAP filter uses sAMAccountName.

Community votes

9 votes

ABSuggested

78%

AD

11%

BD

11%

Question 3 of 70

Refer to the exhibit.

Partial output of FortiOS kernel slabs

Exam FCSS_NST_SE-7.6: Image 1

The partial output of FortiOS kernel slabs is shown.

Which statement about total slab size is true?

Answer choices
Show answer

Correct answer: D

The tcp_session slab is a kernel slab cache used to hold TCP session-related objects. Its entry shows five allocated objects with a size of 1500 kB each, producing a total slab size of 7500 kB. Slab caches are managed by the FortiOS kernel, rather than by user-space processes.

Community votes

6 votes

DSuggested

100%

Question 4 of 70

Refer to the exhibit.

The partial output of diagnose sys session stat command is shown.

Exam FCSS_NST_SE-7.6: Image 1

Which statement about the output shown in the exhibit is correct?

Answer choices
Show answer

Correct answer: B

The 562 sessions shown in the ESTABLISHED state are TCP sessions for which the protocol state is 01 when traffic is not subject to inspection. In FortiGate session tracking, proto_state represents the TCP connection state maintained by the firewall. A state of 01 indicates an established TCP flow in this context, matching the reported count of 562 sessions.

Community votes

10 votes

BSuggested

90%

A

10%

Question 5 of 70

A VPN tunnel is up. To monitor traffic flow, the administrator enters the following CLI commands on an SSH session on FortiGate:

# diagnose debug enable# diagnose sniffer packet any ’udp and port 500’ 4

However, the sniffer does not show any output.

Assuming default configuration values, what are two possible reasons there is no output? (Choose two.)

Answer choices
Show answer

Correct answers: B, D

NAT Traversal encapsulates IPsec traffic in UDP port 4500 when NAT is detected, so a capture limited to UDP port 500 can remain empty even while the tunnel carries traffic. Port 500 is used for the initial IKE negotiation, but it may no longer be the active transport after NAT-T is negotiated. The filter must also include the relevant alternate ports, such as TCP 443 or TCP/UDP 4500, to observe the VPN-related packets. Enabling diagnostic debugging does not suppress packet-sniffer output.

Community votes

6 votes

BDSuggested

100%

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I don't usually leave reviews, but this one felt worth sharing. The questions were quite close to what actually appeared on the exam, more than I expected. I spent about a week going through the material before my test, and it helped me feel more prepared.
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