A FortiGate administrator is reviewing IPsec VPN logs and sees repeated entries of 'IKE: Send IKE SA Info' followed by 'IKE: Delete IKE SA'. What is the most likely cause of these log entries?

The remote peer is renegotiating the IKE SA due to a lifetime expiration

The phase 2 proposal is mismatched

The FortiGate's interface is flapping

The pre-shared key is incorrect on the remote peer

A company is setting up a site-to-site IPsec VPN between their FortiGate and a partner's firewall. The partner requires IKEv2 with AES256-GCM and SHA256, and they insist on using certificate-based authentication. The FortiGate administrator has imported the partner's CA certificate and generated a local certificate. The tunnel fails with an authentication error. What is the most likely cause?

The pre-shared key is incorrect

The phase 2 selector is misconfigured

The local certificate's subject name does not match the peer's expected ID

The phase 1 proposal is set to AES128-SHA1

A FortiGate administrator is configuring a site-to-site IPsec VPN and needs to ensure that the tunnel can carry traffic from multiple subnets on both sides. What is the recommended approach for phase 2 configuration?

Configure a single phase 2 selector with the local and remote subnets

Configure multiple phase 2 selectors, one for each subnet pair

Use a broad phase 2 selector with 0.0.0.0/0 for both local and remote

Configure the phase 2 selector with the tunnel interface IP addresses

A FortiGate administrator is configuring a site-to-site IPsec VPN. The remote peer is a non-FortiGate device that only supports IKEv1. The administrator has configured the phase 1 interface with IKEv2. What will happen when the tunnel attempts to establish?

The tunnel will establish but with reduced security

The tunnel will establish using IKEv2 with a compatibility mode

The tunnel will fail to establish because the IKE versions do not match

The tunnel will establish using IKEv1 automatically

FortinetNSE 4 - FortiOS 7.6 Administrator

Domain 5Objective 4

IPsec VPNs and Review Logs NSE4-FORTIOS-ADMINISTRATOR Practice Questions (Page 2)

Part of the VPNs domain, which accounts for 10-15% of the NSE4-FORTIOS-ADMINISTRATOR exam. Fortinet does not publish an official question count, but from its 90-minute exam (~35–60 total, ~4–9 in this domain), expect 1–2 from this objective — we provide 21 practice questions to prepare you well beyond it. (estimate)

21questions here

5free pages

4concepts

10-15%of the exam

Questions 6–10

6application · medium
A FortiGate administrator is reviewing IPsec VPN logs and sees repeated entries of 'IKE: Send IKE SA Info' followed by 'IKE: Delete IKE SA'. What is the most likely cause of these log entries?
Select an answer first
7expert · medium
A company is setting up a site-to-site IPsec VPN between their FortiGate and a partner's firewall. The partner requires IKEv2 with AES256-GCM and SHA256, and they insist on using certificate-based authentication. The FortiGate administrator has imported the partner's CA certificate and generated a local certificate. The tunnel fails with an authentication error. What is the most likely cause?
Select an answer first
8application · medium
A FortiGate administrator is configuring a site-to-site IPsec VPN and needs to ensure that the tunnel can carry traffic from multiple subnets on both sides. What is the recommended approach for phase 2 configuration?
Select an answer first
9application · medium
A FortiGate administrator is configuring a site-to-site IPsec VPN. The remote peer is a non-FortiGate device that only supports IKEv1. The administrator has configured the phase 1 interface with IKEv2. What will happen when the tunnel attempts to establish?
Select an answer first
10foundation · easy
Which log field in FortiGate IPsec VPN logs indicates the reason why a tunnel failed to establish?
Select an answer first

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IPsec VPNs and Review Logs NSE4-FORTIOS-ADMINISTRATOR Practice Questions (Page 2)

Questions 6–10

A FortiGate administrator is reviewing IPsec VPN logs and sees repeated entries of 'IKE: Send IKE SA Info' followed by 'IKE: Delete IKE SA'. What is the most likely cause of these log entries?

A FortiGate administrator is configuring a site-to-site IPsec VPN and needs to ensure that the tunnel can carry traffic from multiple subnets on both sides. What is the recommended approach for phase 2 configuration?

A FortiGate administrator is configuring a site-to-site IPsec VPN. The remote peer is a non-FortiGate device that only supports IKEv1. The administrator has configured the phase 1 interface with IKEv2. What will happen when the tunnel attempts to establish?

Which log field in FortiGate IPsec VPN logs indicates the reason why a tunnel failed to establish?

Keep studying — VPNs