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| Section | Objectives |
|---|---|
| Topic 1: Enterprise Firewall | - Troubleshooting
|
| Topic 2: SD-WAN | - SD-WAN deployment
|
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NEW QUESTION # 123
Refer to the exhibit.
The administrator did not override the FortiGuard FODN or IP address in the FortiGate configuration Which IP address did FortiGate get when resolving the servicem,fortiguard.net name?
Answer: C
Explanation:
The study guide explicitly explains the FortiGuard flags shown by diagnose debug rating:
* D = Default
* "IP addresses of servers received from DNS resolution"
It then clarifies even more specifically:
* "D = The IP address FortiGate got when resolving the service.fortiguard.net name (usually two or three servers have this flag, if the administrator didn ' t overwrite the FortiGuard FQDN or IP address in the FortiGate configuration)" In the exhibit, among the answer choices, the IP address marked with the D flag is 208.91.112.194 .
Therefore, that is the IP FortiGate got from resolving service.fortiguard.net.
Why the other options are wrong:
* B. 209.22.147.36 is not the correct choice because in the exhibit it is not the DNS-resolution entry identified by the D flag
* C. 64.26.151.37 has no D flag
* D. 96.45.33.65 has no D flag
So the verified answer is: A .
NEW QUESTION # 124
Refer to the exhibits.
The exhibits show the SD-WAN zone configuration of an SD-WAN template prepared on FortiManager and the policy package configuration.
When the administrator tries to install the configuration changes, FortiManager fails to commit.
What should the administrator do to fix the issue?
Answer: C
Explanation:
The SD-WAN 7.6 Enterprise Administrator Study Guide explicitly states: "Firewall policies for SD-WAN traffic must reference SD-WAN zones and not individual members." In the exhibit, HUB1-VPN1 is an individual member of the HUB1 SD-WAN zone. However, policy 3 incorrectly uses HUB1-VPN1 as its outgoing interface. FortiManager cannot compile and commit that policy because an SD-WAN member cannot be referenced directly by an SD-WAN firewall policy. The administrator must change the policy's To interface from HUB1-VPN1 to its parent zone, HUB1.
Option C is incorrect because the guide specifically explains that an IPsec interface does not require normalization when it is used as an SD-WAN member: "SD-WAN members don't use normalized interfaces." The normalized LAN interface shown in the policy is appropriate because it maps the local interface for each managed FortiGate, but the overlay side must reference the HUB1 zone.
Option D remains invalid because it still references individual SD-WAN members. Option A does not correct the invalid outgoing-interface reference; policy 3 already uses the policy package installation targets.
NEW QUESTION # 125
Refer to the exhibit, which shows the partial output of FortiOS kernel slabs.
Which statement is true?
Answer: A
Explanation:
The study guide states:
"The kernel memory slabs are collections of objects with a common purpose. The kernel uses them to store information in memory." It also gives the exact calculation rule:
"Total slab size = available objects x object size"
From the exhibit:
* tcp_session 3 5 1500 ...
So:
* available objects = 5
* object size = 1500
Therefore:
Total slab size = 5 ร 1500 = 7500 kB
That makes D correct, and it is associated with the kernel , not user space.
Why the other options are wrong:
* A is wrong because sctp_session 0 0 1600 ... gives 0 ร 1600 = 0 , but slabs are associated with the kernel , not user space.
* B is wrong because ip_session 1 3 1200 ... gives 3 ร 1200 = 3600 , but again slabs are kernel memory, not user space.
* C is wrong because ip6_session 0 0 1300 ... gives 0 ร 1300 = 0 , not 1300.
NEW QUESTION # 126
Refer to the exhibit, which shows the output of a debug command.
Which two statements about the output are true? (Choose two.)
Answer: B,D
Explanation:
References:
FortiOS Admin Guide: OSPF, Debug Outputs
NEW QUESTION # 127
Refer to the exhibit.
An IPsec VPN tunnel using IKEv2 was brought up successfully, but when the tunnel rekey takes place the tunnel goes down.
The debug command for IKE was enabled and, in the exhibit, you can review the partial output of the debug IKE while attempting to bring the tunnel up.
What is causing. The tunnel to be down?
Answer: D
Explanation:
To determine the cause of the failure, we must analyze the IKEv2 debug output provided in the exhibit (image_ad3dc6.jpg):
Identify the Negotiation Phase:
The debug log shows: responder received CREATE_CHILD exchange.
In IKEv2, the CREATE_CHILD_SA exchange is used to create new Child SAs (Phase 2) or to rekey existing ones.
The fact that the tunnel was previously " brought up successfully " implies the initial IKE SA (Phase 1) is stable, and this error is occurring specifically during a rekey event, which often involves Perfect Forward Secrecy (PFS).
Analyze the Proposals (The Mismatch):
Incoming Proposal (Remote Peer):
The remote peer sends a proposal containing two Diffie-Hellman groups: type=DH_GROUP, val=MODP2048 (Group 14) and type=DH_GROUP, val=MODP1536 (Group 5).
My Proposal (Local FortiGate):
The local FortiGate configuration expects: type=DH_GROUP, val=MODP3072 (Group 15).
Result of the Negotiation:
The debug output concludes with: no proposal chosen and Negotiate SA Error.
This error occurs because the local FortiGate cannot find a common Diffie-Hellman group between what it requires (Group 15) and what the peer is offering (Groups 14 or 5).
While this is technically a mismatch occurring during the Phase 2 (Child SA) creation, " A Diffie-Hellman mismatch " (Option A) is the precise root cause identified in the logs.
Why other options are incorrect:
B: The log shows received create-child request, confirming that UDP traffic is reaching the device and is not blocked.
C: The failure is in the CREATE_CHILD exchange (Phase 2/Rekey), not the IKE_SA_INIT or IKE_AUTH (Phase 1) exchanges.
D: While the mismatch is occurring within the Phase 2 definitions, Option A is the specific technical reason for the no proposal chosen error shown in the DH_GROUP lines.
Reference:
FortiGate Security 7.6 Study Guide (IPsec VPN): " Phase 2 parameters... if Perfect Forward Secrecy (PFS) is enabled, a Diffie-Hellman exchange is performed again. Both peers must match the DH Group. "
NEW QUESTION # 128
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