NSE5_SSE_AD-7.6 Exam Dumps - Fortinet NSE 5 - FortiSASE and SD-WAN 7.6 Core Administrator

According to the SD-WAN 7.6 Core Administrator curriculum and the provided exhibits, the traffic steering decision is determined by the interaction between the Lowest Cost (SLA) strategy and the link health status reported in the event logs.

Rule Strategy (Lowest Cost SLA): The SD-WAN rule configuration for ID 1 (named Critical-DIA) is set to mode sla. In this mode, the FortiGate will only steer traffic through member interfaces that satisfy the assigned Performance SLA targets.

Member Preference: The rule defines priority-members 1 2. This means that under normal conditions (where both links are healthy), Member 1 (port1) is the preferred interface because it is listed first.

Event Log Analysis:

The first log message explicitly states: "Member status changed. Member out-of-sla." for Member 1. This indicates that port1 has exceeded one of the thresholds (latency, jitter, or packet loss) defined in the Corp_HC health check.

The second log confirms: "Number of pass member changed. New Value: 1, Old Value: 2". This verifies that while there were previously two links passing the SLA, now only one link (Member 2/port2) remains in a passing state.

Steering Decision: Because the rule strategy is mode sla and the primary preferred member (port1) is now out-of-sla, the FortiGate immediately disqualifies Member 1 from the selection pool for this specific rule. It then moves to the next available member in the priority list that does satisfy the SLA, which is Member 2 (port2).

Why other options are incorrect:

Option A: FortiGate will not load balance or choose between both links because port1 is currently ineligible due to the SLA failure.

Option B: Steering to port1 would violate the "Lowest Cost (SLA)" rule logic, as that link is no longer meeting the required health standards.

Option D: FortiGate does not "skip" the rule unless no members meet the SLA and there is no fallback configured; in this scenario, port2 is still passing and available.

According to theFortiSASE 24.4 Administration Guideand theFortiSASE Core Administratortraining materials, theOn-net detectionrule setting is a critical component for determining the "trust status" of an endpoint's physical location.

Endpoint Location Verification: On-net rule sets are used to determine if FortiSASE considers an endpoint to beon-net(trusted) oroff-net(untrusted). An endpoint is considered on-net when it is physically located within the corporate network, which is assumed to already have on-premises security measures (like a FortiGate NGFW).

Operational Impact: When an endpoint is detected as on-net, FortiSASE can be configured toexemptthe endpoint from automatically establishing a VPN tunnel to the SASE cloud. This optimization prevents redundant security inspection and conserves SASE bandwidth since the user is already protected by the local corporate firewall.

Detection Methods: To classify an endpoint as on-net, administrators configure rule sets that look for specific environmental markers, such as:

Known Public (WAN) IP: If the endpoint's public IP matches the corporate headquarters' egress IP.

DHCP Server: If the endpoint receives an IP from a specific corporate DHCP server.

DNS Server/Subnet: Matching internal DNS infrastructure or specific internal IP ranges.

Dynamic Policy Application: By accurately determining if an endpoint is on or off-net, FortiSASE ensures that theFortiClientagent only initiates its secure internet access (SIA) tunnel when the user is in an untrusted location (e.g., a home network or public Wi-Fi).

Why other options are incorrect:

Option A: User authentication is a separate process and is not controlled by the on/off-net detection rules, which focus on the network environment rather than user credentials.

Option B: While on-net status affectshowtraffic is routed (VPN vs. local), these rules specificallydetermine the statusitself rather than defining the routing tables for private vs. cloud resources.

Option D: Geographical location (Geo-location) is a different filtering criterion often used in firewall policies; on-net detection is specifically about the proximity to the trusted corporate perimeter.

According to theSD-WAN 7.6 Core Administratorcurriculum and theFortiOS 7.6 Administration Guide, setting common web-based services like Facebook and LinkedIn as destinations in an SD-WAN rule is primarily accomplished through theInternet Service Database (ISDB).

Internet Service vs. Application Control: In FortiOS, there is a distinction betweenInternet Services(which use a database of known IP addresses and ports to identify traffic at the first packet) andApplications(which require the IPS engine to inspect deeper into the packet flow to identify Layer 7 signatures).

SD-WAN Efficiency: Fortinet recommends using theInternet service fieldfor services like Facebook and LinkedIn in SD-WAN rules because it allows the FortiGate to steer the traffic immediately upon the first packet. If the "Application" signatures were used instead, the first session might be misrouted because the application is not identified until after the initial handshake.

GUI Configuration: As shown in the exhibit (image_b3a4c2.png), the "Destination" section of an SD-WAN rule includes anInternet servicefield by default. To steer Facebook and LinkedIn traffic, the administrator simply clicks the "+" icon in that field and selects the entries for Facebook and LinkedIn from the database.

Feature Visibility (Alternative): While youcanenable a specific "Application" field inSystem > Feature Visibility(by enabling "Application Detection Based SD-WAN"), this is typically used for less common applications that do not have dedicated ISDB entries. For the specific "applications" mentioned (Facebook and LinkedIn), they are natively available in theInternet servicefield, making Option B the most direct and common implementation.

Why other options are incorrect:

Option A: Licensing for application signatures is part of the standard FortiGuard services and is not a prerequisite specific only to "applications as destinations" in SD-WAN rules.

Option C: Standalone FortiGate devices fully support application-based and ISDB-based steering in SD-WAN rules.

Option D: While enabling feature visibility would add anadditionalfield for L7 applications, it is not a "must" for Facebook and LinkedIn, which are already accessible via the Internet Service field provided in the default GUI layout.

According to theSD-WAN 7.6 Core Administratorstudy guide andFortiOS 7.6 Administration Guide, the "implicit rule" is the default rule at the bottom of the SD-WAN rule list (ID 0). It is only evaluated if traffic does not match any manually configured SD-WAN rules.

Policy Route Table Context (Option B): SD-WAN rules are technically a specialized form of policy-based routing. For a packet to match theimplicit rule, it must first pass through the routing hierarchy. If traffic matches the implicit rule, it indicates that it did not match any higher-priority user-defined SD-WAN rules or any specific entries in the manualpolicy route tablethat would have intercepted the traffic earlier.

Session Information (Option E): When you use the CLI to inspect an active session (e.g., diagnose sys session list), the output contains a field for theSD-WAN Service ID. If traffic is steered by a user-defined rule, it displays the ID of that rule (e.g., service_id=1). However, when traffic falls through to theimplicit rule, the session information displaysno SD-WAN service ID(it often shows as 0 or is omitted), because the implicit rule does not function as a "service" in the same way user-defined rules do.

Routing Behavior: The implicit rule follows the standard routing table (RIB/FIB) logic. It uses thepriorityanddistanceof the static routes to determine the path. If multiple paths have the same distance and priority, it uses the algorithm set by v4-ecmp-mode, but this is a function of the routing engine, not the SD-WAN engine itself.

Why other options are incorrect:

Option A: While v4-ecmp-mode (e.g., source-ip-based) is used for ECMP routing, this is part of the general FortiOS routing behavior for equal-cost paths in the FIB, whereas the implicit rule simply "hands over" the decision to that routing table.

Option C: When traffic matches the implicit rule, the session is actually flagged with vwl_id=0 and potentially dirty if a route change occurs, but vwl_default is not the standard flag name used in this specific context in the curriculum.

Option D: This is incorrect because the implicit ruledoes respect weight, distance, and priorityas defined in the static routes within the routing table; it does not distribute traffic "regardless" of these values.

According to theFortiSASE 7.6 Feature Administration Guideand the latest updates to theNSE 5 SASEcurriculum, FortiSASE has introduced native lifecycle management for FortiClient agents to reduce the operational burden on IT teams who previously relied solely on third-party MDM (Mobile Device Management) or GPO (Group Policy Objects) for every update.

TheEndpoint Upgradefeature, found underSystem > Endpoint Upgradein the FortiSASE portal, allows administrators to perform the following:

Centralized Version Control: Administrators can see which versions are currently deployed and which "Recommended" versions are available from FortiGuard.

Scheduled Rollouts: You can choose to upgrade all endpoints or specific endpoint groups at a designated time, ensuring that upgrades do not disrupt business operations.

Status Monitoring: The portal provides a real-time dashboard showing the progress of the upgrade (e.g.,Downloading,Installing,Reboot Pending, orSuccess).

Manual vs. Managed: While MDM is still highly recommended for theinitial onboarding(the first time FortiClient is installed and connected to the SASE cloud), all subsequent upgrades can be handled natively by the FortiSASE portal.

Why other options are incorrect:

Option B: Manual upgrades are inefficient for large-scale deployments (~400 users in this scenario) and are not the intended "feature-rich" solution provided by FortiSASE.

Option C: "Onboarding" refers to the initial setup. Re-onboarding every time a version changes would be redundant and counterproductive.

Option D: While the system canmanagethe upgrade, it is not "auto-upgraded on demand" by the client itself without administrative configuration in the portal. The administrator must still define the target version and schedule.