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| Section | Objectives |
|---|---|
| Topic 1: Enterprise Firewall | - High availability - Troubleshooting - VPN technologies - Advanced firewall deployment - Centralized management and analytics - Authentication and identity - Routing and advanced networking - Security Fabric integration |
| Topic 2: SD-WAN | - SD-WAN architecture - Overlay VPN - SD-WAN routing - Performance SLA - Deployment and troubleshooting - Application steering |
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質問 # 158
Refer to the exhibit.
The partial output of diagnose sys session stat command is shown.
Which statement about the output shown in the exhibit is correct?
正解：C
解説：
The correct answer is C .
The exhibit shows:
* 562 in ESTABLISHED state
* 27 in CLOSE state
* memory_tension_drop=0
* ephemeral=0/131072
According to the study guide, for TCP sessions: "The protocol state in the session table is a two-digit number. For TCP, the first number (from left to right) is related to the server-side state and is 0 when the session is not subject to any inspection (flow or proxy)... The second digit is the client-side state." The same page also shows that value 1 = ESTABLISHED So, if a TCP session is in ESTABLISHED state and there is no inspection , its proto_state is 01 :
* first digit 0 = no inspection
* second digit 1 = ESTABLISHED
That makes C correct. This is also consistent with FortiOS examples showing established TCP sessions with proto=6 proto_state=01 Why the other options are wrong:
* A is wrong because the field that indicates sessions dropped due to low free memory is memory_tension_drop, and in the exhibit it is 0 , not 113. The study guide states: "If there is a lack of free memory, the kernel deletes the oldest sessions. The command shown on this slide displays the number of sessions the kernel deleted because of this mechanism." So 113 is the clash value, not memory-tension drops.
* B is wrong because ephemeral=0/131072 does not mean 131072 ephemeral sessions were recorded.
The study guide explains that FortiGate "sets a hard limit on the maximum number of ephemeral sessions that can exist at the same time in the session table." Therefore:
* 0 = current ephemeral sessions
* 131072 = maximum allowed ephemeral sessions for that model/context
* D is wrong because the study guide says the temporary retention for possible out-of-order packets happens in state value 5 (TIME_WAIT) : "When a session is closed by both the sender and receiver, FortiGate keeps that session in the session table for a few seconds, to allow for any out- of-order packets that might arrive after the FIN/ACK packet. This is the state value 5." But the exhibit shows 27 in CLOSE state , and the same table shows CLOSE = 6 , not TIME_WAIT So the verified answer is C .
質問 # 159
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.)
正解：A
解説：
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.
質問 # 160
Refer to the exhibit.
A partial output from an IKE real-time debug is shown
The administrator does not have access to (he remote gateway
Based on the debug output, which two conclusions can you draw? (Choose two.)
正解：C、D
解説：
To determine the correct conclusions, we analyze the specific lines in the IKE real-time debug output provided in the exhibit:
Analysis for Option A (The remote peer is the initiating peer):
Evidence: The very first line of the debug output reads: ike 0:624000:98: responder: main mode get 1st message...
The keyword responder indicates that this local FortiGate is receiving the connection request. Consequently, the remote peer must be the initiator sending the request. The phrase " get 1st message " confirms the local unit is receiving the initial packet of the negotiation sequence.
Conclusion: This statement is True.
Analysis for Option B (This is a phase 1 negotiation):
Evidence: The same line mentions main mode.
In IPsec VPNs, Main Mode and Aggressive Mode are exclusively used for Phase 1 (IKE SA) negotiations.
Phase 2 (Child SA) negotiations use Quick Mode. The presence of " main mode " definitively identifies this as a Phase 1 exchange.
Conclusion: This statement is True.
Analysis for Option C (There is a Diffie-Hellman group mismatch):
Evidence:
Incoming proposal (Remote): Lists type=OAKLEY_GROUP, val=MODP2048 (Group 14) in the first proposal proposal.
My proposal (Local): Lists type=OAKLEY_GROUP, val=MODP2048 (Group 14).
Since both the remote peer and the local gateway support and are proposing MODP2048 (Group 14), there is no Diffie-Hellman group mismatch. The actual mismatch visible in the logs is between the Encryption/Hash algorithms (Remote proposes AES-256/SHA2-256, while Local proposes AES-128/SHA), but the DH groups match.
Conclusion: This statement is False.
Analysis for Option D (This is a phase 2 negotiation):
As established in the analysis for Option B, " Main Mode " is a Phase 1 protocol. If this were Phase 2, the debug would show " Quick Mode " .
Conclusion: This statement is False.
Reference:
FortiGate Security 7.6 Study Guide (IPsec VPN): " Phase 1 modes: Main mode and Aggressive mode. " FortiOS Debugging documentation: Explains that " responder " indicates the device receiving the IKE initialization.
質問 # 161
Refer to the exhibit.
The exhibit shows the output of a session. Which two statements are correct? (Choose two.)
正解：A、D
解説：
The correct answers are C and D.
For D, the session output shows proto=6, which means TCP, and proto_state=01. The study guide explains that for TCP sessions, "the first number (from left to right) is related to the server-side state and is 0 when the session is not subject to any inspection (flow or proxy). ... The second digit is the client-side state." It also shows that value 1 = ESTABLISHED So proto_state=01 means:
first digit 0 = no inspection
second digit 1 = ESTABLISHED
That confirms the TCP session has been successfully established.
For C, the study guide section "Session for an Authenticated User" states: "Any session for traffic coming from an authenticated user contains the authed flag. Additionally, the username is added to the session information." In the exhibit, the session contains user=User1 and an authentication state flag (authd), which indicates the session is associated with an authenticated user.
Why the other options are wrong:
A is wrong because the session did match a firewall policy. The study guide says the session output includes
"The ID of the matching policy" In the exhibit, the session shows policy_id=1, so a firewall policy was matched.
B is wrong because the study guide explains the gwy field as:
first value = gateway to destination
second value = gateway to source The exhibit shows gwy=10.1.0.254/10.1.10.1, so:
gateway to destination = 10.1.0.254
gateway to source = 10.1.10.1
So the verified answers are: C, D.
質問 # 162
Refer to the exhibit.
The modified output of live routing kemel is shown
Which two statements about the output are (rue? (Choose two.)
正解：B、D
解説：
We must analyze the flags (*, > , S, O, B) and Administrative Distances (AD) shown in the get router info routing-table database exhibit to determine the correct statements.
Analysis for Option A (The BGP route to 10.0.4.0/24 is not in the forwarding information base):
True. Look at the entry for 10.0.4.0/24.
There is an OSPF route: O * > 10.0.4.0/24 [110/2]. The * indicates it is in the FIB, and > indicates it is the selected route.
There is a BGP route: B 10.0.4.0/24 [200/10]. This line lacks the * flag.
Reason: The OSPF route has an Administrative Distance of 110. The BGP route (iBGP) has an AD of 200.
Since 110 is lower than 200, OSPF wins, and the BGP route is not installed in the Forwarding Information Base (FIB).
Analysis for Option B (The default static route through 10.200.1.254 is in the forwarding information base):
True. Look at the 0.0.0.0/0 entries.
The first entry is S * > 0.0.0.0/0 [10/0] via 10.200.1.254.
The * flag confirms this specific route is installed in the FIB.
The second static route (via 10.200.2.254) has a higher distance ([20/0]) and no * flag, so it is inactive.
Why C is False: ECMP (Equal Cost Multi-Path) requires routes to have the same cost/priority. Here, one static route has AD 10 and the other has AD 20. They are not equal, so ECMP is not performed.
Why D is False: The routing table database shows active routes, not the raw Link State Advertisement (LSA) database. You cannot determine the number of LSAs received solely from this output.
Reference:
FortiGate Security 7.6 Study Guide (Routing): " The routing table database displays all known routes... The * indicates the route is in the FIB... Lower Administrative Distance is preferred. "
質問 # 163
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