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| Section | Objectives |
|---|---|
| Topic 1: SD-WAN | - SD-WAN deployment
|
| Topic 2: Enterprise Firewall | - Troubleshooting
|
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NEW QUESTION # 112
Refer to the exhibits.
An OSPF peer is advertising route 172.16.52.0/24. The local FortiGate is configured with an inbound distribution list that allows the 172.16.0.0/16 network to be injected into its routing table. However, the 1 '
2.16.52.0/24 subnet cannot be seen in the FIB.
Which two stops can the administrator of the local FortiGate take to ensure that the advertised 172.16. 52.0/24 subnet will be injected into the routing table? (Choose two.)
Answer: C,D
Explanation:
The issue is caused by the strict matching logic of the configured Prefix List.
Current State: The rule is edit 1 with set prefix 172.16.0.0 255.255.0.0 and both ge (greater than or equal) and le (less than or equal) are unset.
Behavior: When ge and le are unset, FortiOS requires an exact match of the subnet mask. The current rule only matches the exact network 172.16.0.0/16. It denies 172.16.52.0/24 because the mask (/24) does not match the rule ' s mask (/16).
To fix this and inject 172.16.52.0/24, you must modify the list to match the /24 mask:
A). Add another entry to the prefix list to specifically allow the 172.16.52.0/24 network:
Creating a new rule (e.g., edit 2) with set prefix 172.16.52.0 255.255.255.0 will provide an exact match for the incoming route, allowing it to pass the distribute-list.
B). Change the ge value to 17:
By configuring set ge 17 on the existing rule (conceptually 172.16.0.0/16 ge 17), you change the logic from " exact match " to " range match " .
This configuration tells the router to match any prefix starting with 172.16.x.x that has a subnet mask length of 17 or greater.
Since the incoming route is a /24, and 24 is greater than 17, the route will match the prefix list and be accepted.
Why other options are incorrect:
C: The option text appears to read " Change the ... value to 16 " . If this refers to le 16, it would enforce the mask to be exactly /16 or less, which still excludes /24.
D: Changing the default behavior to implicit allow defeats the purpose of a filter (security control) and is not a standard configuration step for fixing a single missing route.
Reference:
FortiGate Security 7.6 Study Guide (Routing): " In prefix-lists, if ge and le are not used, the subnet mask must match exactly. To match subnets within a range, you must define the prefix length boundaries using ge or le. "
NEW QUESTION # 113
Refer to the exhibit, which shows the partial output of FortiOS kernel slabs.
Which statement is true?
Answer: B
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 × 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 × 1600 = 0 , but slabs are associated with the kernel , not user space.
* B is wrong because ip_session 1 3 1200 ... gives 3 × 1200 = 3600 , but again slabs are kernel memory, not user space.
* C is wrong because ip6_session 0 0 1300 ... gives 0 × 1300 = 0 , not 1300.
NEW QUESTION # 114
Exhibit.
Refer to the exhibit, which shows a partial output of diagnose hardware aysinfo memory.
Which two statements about the output are true? (Choose two.)
Answer: A,C
Explanation:
The partial output from diagnose hardware sysinfo memory provides details on system RAM allocation.
According to Fortinet ' s technical documentation for memory troubleshooting and Linux memory management (which FortiOS is based on):
MemFree is the portion of physical memory not currently allocated to any running process or kernel function.
Thus, 708880 kB is available and can be immediately used by user-space programs or system operations.
Inactive refers to pages in the memory cache that were previously in use for I/O or file system buffering but are now not actively referenced. These pages are retained in memory for quick access if needed again, but can be reclaimed for other memory operations if demand increases. The value 98908 kB here represents currently unused cache pages (inactive pages), ready for repurposing or deletion if the system requires more RAM.
Cached represents the total amount of system memory allocated to cache, which includes both active and inactive cache pages. It does not, by itself, represent I/O cache exclusively, nor does " inactive " mean memory "will never be used" as the kernel can re-purpose inactive pages on demand.
References:
Fortinet Technical Tip: Explaining the ' diagnose hard sysinfo memory ' command FortiOS System Administration Guide: Linux Memory Reporting, Cached and Inactive Statistics
NEW QUESTION # 115
Refer to the exhibit.
The output of the command diagnose vpn tunnels liar is shown.
Which two statements accurately describe the status of the tunnel? (Choose two.)
Answer: A,D
Explanation:
Based on the Fortinet FCSS - Network Security 7.6 documents and the analysis of the VPN tunnel exhibit, here is the verified answer.
Questions no: 91
Verified answer: A, C
Comprehensive and Detailed Explanation with all FCSS - Network Security 7.6 documents:
To determine the status of the VPN tunnel, we must examine the specific counters and fields in the diagnose vpn tunnel list output provided in the exhibit.
Analyze Phase 2 Status (Option A):
The output displays child_num=0.
In IKEv2 (and IKEv1 implementations in FortiOS), " Child SAs " refer to the Phase 2 (IPsec) Security Associations that carry the actual data traffic.
A value of 0 indicates that no Phase 2 tunnels are established. If Phase 2 were up, child_num would be at least
1.
Additionally, under the proxyid section, the field sa=0 confirms there is no active Security Association for that traffic selector.
Analyze Traffic Status (Option C):
The stat line shows: rxp=0 txp=0 rxb=0 txb=0.
rxp (Received Packets) and txp (Transmitted Packets) are both zero. This definitively confirms that no traffic is traversing the tunnel currently. This is expected since Phase 2 is down.
Analyze Phase 1 Status (Why B is incorrect):
The tunnel entry exists in the list with a valid tun_id, and NAT-Traversal is active (natt: mode=keepalive).
The presence of the tunnel in this command output, along with active Keepalive mechanisms, typically indicates that Phase 1 (IKE SA) is established and the peers are communicating on port 4500 (NAT-T), even though the data tunnels (Phase 2) failed to negotiate. If Phase 1 were down, the tunnel would often not appear in this " list " view or would show different status flags indicating a complete connection failure.
Conclusion: The exhibit shows a scenario where the Phase 1 control channel is likely up (evidenced by the entry existence and NATT keepalives), but the Phase 2 data channel is down (child_num=0), resulting in zero traffic flow (rxp=0/txp=0).
NEW QUESTION # 116
Refer to the exhibit.
Based on the exhibit, what is the first message with which Spoke 1 replies to the hub, instructing it to bring up the dynamic tunnel when a client generates traffic destined for Spoke 2? (Choose one answer.)
Answer: B
Explanation:
The ADVPN shortcut negotiation begins after traffic from Spoke 1 to Spoke 2 initially travels through the hub. When the hub detects that both spokes can establish a more direct connection, the hub-not Spoke 1- sends the first control message: a shortcut offer to Spoke 1.
The SD-WAN 7.6 Enterprise Administrator Study Guide then states: "Spoke 1 acknowledges the shortcut offer by sending a shortcut query to the hub." Therefore, the first message that Spoke 1 sends in response is the shortcut query, making option A correct.
The hub subsequently forwards that query to Spoke 2. Spoke 2 responds with a shortcut reply, which the hub forwards back to Spoke 1. After Spoke 1 receives the reply containing the necessary peer information, Spoke
1 and Spoke 2 begin IKE negotiation and establish the dynamic spoke-to-spoke shortcut tunnel.
Consequently, the shortcut reply occurs later and originates from Spoke 2, while the offer originates from the hub. "Shortcut forward" describes the hub's forwarding action rather than Spoke 1's first response. This behavior is part of Fortinet's ADVPN shortcut architecture.
NEW QUESTION # 117
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