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| Section | Objectives |
|---|---|
| SD-WAN | - Traffic steering
|
| Enterprise Firewall | - Authentication and Access Control
|
>> Test NSE7_FSN_AR-7.6 Questions Vce <<
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NEW QUESTION # 169
Refer to the exhibit.
A network topology and a partial routing table are shown.
FortiGate has already been configured with a firewall policy that allows all ICMP traffic to flow from port1 to port3.
Which two changes can the administrator perform to ensure the server at 10.4.0.1/24 receives the ICMP echo reply from the laptop at 10.1.0.1/24? (Choose two.)
Answer: A,B
Explanation:
The correct answers are A and C.
The study guide describes this exact asymmetric ICMP scenario. It states:
"The server sends an echo request to the PC through port2 of the local router, effectively bypassing FortiGate.
When it receives the echo request, the PC responds with an echo reply through its default gateway, 10.1.0.2, which is port1 on FortiGate. Because there is no existing session, the echo reply is dropped. All subsequent echo replies are blocked." That means the current problem exists because:
the ICMP request bypasses FortiGate
the ICMP reply goes through FortiGate
FortiGate has no matching session, so it drops the reply
The study guide then shows the exact corrective option:
"Allowing asymmetric routing:"
config system settings
set asymroute enable
end
It further explains:
"After the packet passes through the FortiGate CPU, FortiGate forwards the packet using the FIB, even though there are no session matches. FortiGate forwards all subsequent echo replies using the FIB." So A is correct.
The other valid fix is to make the traffic symmetric by changing the laptop's default gateway so the reply no longer goes through FortiGate. In the exhibit, the alternate gateway is 10.1.0.254, which is the local router on the same subnet. If the laptop uses 10.1.0.254 instead of 10.1.0.2, the ICMP echo reply follows the same bypass path as the echo request, so the server receives it without involving FortiGate session validation. This makes C correct.
Why the other options are wrong:
B is wrong because this is not an RPF problem. The study guide explains RPF as a reverse path lookup used to validate whether a packet arrived on a legitimate interface, mainly for spoofing protection. The issue in this scenario is a missing session due to asymmetric routing, not a strict-versus-feasible RPF failure D is wrong because FortiGate already has the specific route 10.4.0.0/24 through port3 in the routing table shown in the exhibit, so adding a default static route to port3 is unnecessary and not the reason the echo reply is being dropped So the verified answers are: A, C.
NEW QUESTION # 170
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: A,B
Explanation:
The correct answers are A and B .
The Network Security Support Engineer 7.6 Study Guide states under OSPF Troubleshooting :
"Follow these steps to troubleshoot an OSPF problem between two peers:
* Check that the local router can reach the remote peer. IP addresses must be in the same subnet and have the same subnet mask.
* Ensure that IP protocol 89 is not blocked.
* Hello and dead intervals must match.
* The OSPF router ID for each peer must be unique. Duplicate router IDs are not allowed.
* Do the MTUs match?
* If authentication is enabled, the type and password must match on both sides."** The same page also summarizes the troubleshooting tips as:
* "Do peers have an IP address within the same subnet?"
* "Is IP protocol 89 blocked?"
This directly confirms:
* A is correct
* B is correct
Why the other options are wrong:
* C is wrong because TCP port 179 is used by BGP , not OSPF. OSPF uses IP protocol 89 , as the study guide explicitly notes
* D is wrong because the study guide's OSPF adjacency troubleshooting checklist does not require an active static route to the peer. OSPF neighbors form adjacency on directly reachable networks, and the guide instead focuses on same subnet, protocol 89, intervals, router ID, MTU, and authentication matching So the verified answers are: A, B .
NEW QUESTION # 171
Refer to the exhibit.
The VDOM configuration on a FortiGate device is shown. You discover that web filtering stopped working in Core1 and Core2 after a maintenance window.
What are two reasons why web filtering stopped working? (Choose two answers.)
Answer: B,D
Explanation:
The exhibit identifies the root VDOM as the management VDOM, indicated by the green check mark. The Enterprise Firewall 7.6 Administrator Study Guide explains that the management VDOM handles FortiGuard database downloads, license validation, and FortiGuard rating connectivity on behalf of the entire FortiGate system. It states that FortiGuard updates obtained through the management VDOM "will affect all VDOMs." Consequently, the root VDOM must reach either a public Fortinet Distribution Network server or a FortiManager configured as a FortiGuard Distribution Server in an isolated environment. The guide specifically identifies connectivity to "a FortiManager serving as a FortiGuard Distribution Server (FDS) in a closed network" as the alternative to public FortiGuard access. Loss of both paths prevents Core1 and Core2 from using current FortiGuard web-filtering information. Therefore, options A and B are correct.
Core1 and Core2 do not need to become management VDOMs; FortiGate uses one designated management VDOM for these system-level services. A VDOM link is used to route user traffic between VDOMs and is not required for distributing FortiGuard services, eliminating option D.
NEW QUESTION # 172
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: A,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 # 173
Which Iwo actions does FortiGate take after an administrator enables the auxiliary session selling? (Choose two.)
Answer: B,D
Explanation:
When the " auxiliary session " setting is enabled (typically via config system npu or implicitly for ECMP on NP6/NP7 processors), the FortiGate alters how it manages sessions to support hardware offloading for traffic that might switch interfaces (like ECMP or SD-WAN).
B). FortiGate accelerates all ECMP traffic to the NP6 processor:
The primary purpose of enabling auxiliary sessions is to ensure that ECMP traffic can be fully offloaded (accelerated) by the NPU. Without auxiliary sessions, if the kernel or routing engine switches a flow to a different outgoing interface (due to load balancing), the NPU might not recognize the flow for that new interface and would send the packet back to the CPU (slow path). Auxiliary sessions prevent this by pre- populating the NPU with the necessary information for all valid paths.
D). FortiGate creates two sessions in case of a routing change:
Technically, the FortiGate creates the primary session (for the currently selected path) and an auxiliary session (for the alternative path). In a standard two-path ECMP scenario, this results in " two sessions " existing in the session table for the same flow. This ensures that if a routing change occurs (e.g., the flow shifts to the second path), the traffic continues to be processed by the NPU without interruption or re- evaluation by the CPU.
NEW QUESTION # 174
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