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| Section | Objectives |
|---|---|
| SD-WAN | - Application steering - Performance SLA - SD-WAN architecture - Deployment and troubleshooting - SD-WAN routing - Overlay VPN |
| Enterprise Firewall | - Routing and advanced networking - Troubleshooting - Security Fabric integration - VPN technologies - Advanced firewall deployment - Centralized management and analytics - Authentication and identity - High availability |
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NEW QUESTION # 158
Refer to the exhibit, which shows the output of a diagnose command. What can you conclude from the RTT value?
Answer: B
Explanation:
The correct answer is A .
The study guide explicitly explains the diagnose debug rating table and says that for each server IP, the output shows "The round trip delay" That means the RTT value represents the time it takes for FortiGate to send a request and receive the reply from that FortiGuard server.
The FortiOS administration guide also confirms this by stating:
"Each server is probed for Round Trip Time (RTT) every two minutes."
Why the other options are wrong:
* B is wrong because packet loss is shown separately by Curr Lost and Total Lost , while RTT is the round-trip delay
* C is wrong because license-validation behavior is indicated by flags such as I = Initial , not by the RTT value itself
* D is wrong because the documents do not say RTT starts at a fixed value of 10; it is measured dynamically as round-trip delay So the verified answer is: A .
NEW QUESTION # 159
What can cause an IKEv2 tunnel to go down after it was initially brought up successfully?
Answer: D
Explanation:
The correct answer is D.
The study guide explains that IKEv2 has two initial exchanges:
IKE_SA_INIT
IKE_AUTH
and then later exchanges such as:
CREATE_CHILD_SA
It also states the roles of those exchanges:
IKE_SA_INIT negotiates the security settings for IKE traffic
IKE_AUTH performs mutual authentication and sets up the piggyback child SA CREATE_CHILD_SA creates a new child SA or rekeys an existing child SA Most importantly, the study guide explicitly says:
"By IKEv2 design, no Diffie-Hellman public key is exchanged during an IKE_AUTH exchange.
Consequently, any phase 2 Diffie-Hellman group configuration mismatch between FortiGate and the peer is experienced only during the first rekey (CREATE_CHILD_SA exchange) of the child SA created during IKE_AUTH." This proves the key idea behind the question: an IKEv2 tunnel can come up successfully first, then fail later during a CREATE_CHILD_SA rekey/renegotiation event because of a phase 2 mismatch. Among the provided options, the matching later-stage cause is mismatched quick-mode selectors during CREATE_CHILD_SA.
Why the other options are wrong:
A is wrong because if the proposal mismatch were in the initial negotiation path, the tunnel would fail during establishment, not after it was already up. The study guide places initial tunnel establishment in IKE_SA_INIT and IKE_AUTH B is wrong because a mismatch in IKE_SA_INIT affects the initial establishment stage, not a tunnel that was already brought up successfully C is wrong because a pre-shared key mismatch is part of authentication during IKE_AUTH, so the tunnel would not come up successfully in the first place
NEW QUESTION # 160
Refer to the exhibit, which shows the partial output of a real-time OSPF debug.
Why are the two FortiGate devices unable to form an adjacency?
Answer: C
NEW QUESTION # 161
Refer to the exhibit.
The routing table information is shown.
Assuming a default configuration, which three statements about the RPF check on FortiGate are correct? (Choose three.)
Answer: A,C,D
Explanation:
The correct answers are A, D, and E . This is a feasible path RPF check scenario. In FortiGate's default RPF behavior, FortiGate checks whether the routing table contains a valid return route to the source IP address through the same interface on which the packet arrived . The study guide's RPF feasible path example states that FortiGate "checks the routing table for a route that matches the source address and incoming interface of the first original packet." It then gives the exact result: User A passes because "there is a default route through wan1," so packets received on wan1 pass the RPF check regardless of source address.
User B fails because FortiGate does not have a route to 95.56.234.24 through wan2 . User C fails because FortiGate does not have a route to 10.0.4.63 through port1 . Therefore, option B is wrong because FortiGate is not allowing asymmetric return routing here. Option C is wrong because the default route points out wan1 , not port1 , so it cannot validate User C's packet arriving on port1.
NEW QUESTION # 162
Refer to the exhibit, which shows a partial output of the real-time LDAP debug.
What two actions can the administrator take to resolve this issue? (Choose two.)
Answer: B,D
NEW QUESTION # 163
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