Fortinet NSE6_FSW-7.2 NSE6_FSW-7.2 - Fortinet NSE 6 - FortiSwitch 7.2 Exam Practice Test

"The tool is a Python script that converts the supported settings in a FortiSwitch standalone configuration file to the equivalent FortiOS settings for a managed switch." Reference: FortiSwitch 7.2 Study Guide, page 349

The native VLAN is implicitly part of the allowed VLAN on the port (C): On a managed FortiSwitch port, the native VLAN, which is the VLAN assigned to untagged traffic, is implicitly included in the list of allowed VLANs. This means it does not need to be explicitly specified when configuring VLAN settings on the port. This configuration simplifies VLAN management and ensures that untagged traffic is handled correctly without additional configuration steps.

Location (C): FortiSwitch uses LLDP-MED (Link Layer Discovery Protocol - Media Endpoint Discovery) to advertise various attributes to IP phones, among which "Location" is crucial in emergency situations. This information helps emergency responders to determine the physical location of the calling device, which is vital for prompt response in critical situations.

When loop guard is enabled on port1 and port2 configured with the same native VLAN (VLAN 10), there are specific scenarios under which port1 can be shut down due to loop guard operation:

A.port1 was shut down by loop guard protection.Loop guard is a specific feature used in network environments to prevent alternative or redundant loops. When loop guard is active, it can shut down a port if it stops receiving BPDU (Bridge Protocol Data Units) on a port that is expected to receive them, assuming a loop or link failure and putting the port into an inconsistent state to prevent potential loops.

B.STP triggered a loop and applied loop guard protection on port1.If the Spanning Tree Protocol (STP) detects a loop or loss of BPDU transmissions while loop guard is enabled, it will proactively shut down the port to prevent network instability or a broadcast storm. This is an essential function of loop guard within the context of STP, providing additional protection against topology changes that could introduce loops.

References:

Additional details about loop guard functionality and STP interaction can be found in the FortiSwitch administration guides, accessible viaFortinet Documentation.

Regarding the scenario where a FortiSwitch did not reboot after the authorization process while the other devices did, the most likely cause, given the configuration settings in the exhibit, is:

The management mode was set to use FortiLink mode (Option B): If the FortiSwitch was already configured to use FortiLink for its management mode, it may not require a reboot to complete the authorization process as its management interface settings are already aligned with FortiLink requirements. This is unlike switches that might be transitioning from a standalone or another management mode, which would typically require a reboot to apply new management settings fully.

References:

FortiLink mode specifically tailors FortiSwitch to be managed via a FortiGate device, integrating its operation into the wider security fabric without needing a reboot if it is already set to this mode before authorization. This contrasts with other management modes where transitioning to FortiLink could necessitate a system restart to initialize the new configuration.

The two reasons why port1 can be shut down are loop guard protection and Spanning Tree Protocol (STP).

Loop guard protection:This is a feature that helps to prevent switching loops in a network.expand_more A loop guard can be configured on a port to monitor for specific traffic patterns that indicate a loop. If loop guard protection detects a loop, it will shut down the port to prevent the loop from causing problems.

STP:STP is a protocol that helps to prevent switching loops.expand_more When multiple paths exist between two network devices, STP will block all but one of the paths, creating a loop-free topology.expand_more If STP detects a loop, it will shut down the ports that are involved in the loop.

In the exhibit, both ports 1 and 2 are configured with the same native VLAN 10. This configuration could create a switching loop if both ports are connected to devices on the same network segment. If a loop occurs, loop guard protection or STP could shut down port1 to prevent the loop from causing problems.

References:

Fortinet FortiSwitch 7.2 Administration Guidehttps://docs.fortinet.com/document/fortigate/7.4.3/administration-guide/954635/getting-started

When FortiGate exports configuration settings to a managed FortiSwitch stack with sampling mode set to "perimeter is true," the behavior is:

B. FortiGate configures FortiSwitch to perform ingress sampling on all switch interfaces, except ICL and ISL interfaces.This setting ensures that all incoming traffic on normal operational ports is sampled for monitoring and analysis purposes, but it excludes the inter-chassis link (ICL) and inter-switch link (ISL) interfaces from sampling. These exclusions are typically made to prevent the duplication of sampled data and to reduce unnecessary load on the monitoring system, as these links often carry traffic already monitored at other points.

Options A and D are incorrect because they either generalize the sampling across all interfaces without exceptions or incorrectly specify egress sampling on management interfaces. Option C is also incorrect as FortiGate can modify existing sampling settings to fit the perimeter-based configuration requirement.

Tail-drop mode is a congestion management technique used in network devices, including FortiSwitches, to handle congestion on network ports:

Tail-Drop Mode (A):

Behavior:When a queue reaches its maximum capacity on a congested port, tail-drop mode simply drops any incoming packets that arrive after the buffer is full. This continues until the congestion is alleviated and there is space in the queue to accommodate new packets.

Application:This is a straightforward approach used when the device’s buffer allocated to the port becomes full due to sustained high traffic, preventing buffer overflow and maintaining system stability.

References:For more details on congestion management techniques and settings on FortiSwitch, you can refer to the configuration manuals available on:Fortinet Product Documentation

Based on the DHCP snooping configuration details provided in the exhibit:

B. FortiSwitch is configured to trust DHCP replies coming on FortiLink interface.The configuration segment shows "trusted ports : port2 FlInK1 MLAG0," indicating that the FortiSwitch is configured to trust DHCP replies coming from the specified ports, including the FortiLink interface labeled FlInK1. This setup is critical in environments where the FortiLink interface connects directly to a trusted device, such as a FortiGate appliance, ensuring that DHCP traffic on these ports is considered legitimate.

D. Global configuration for DHCP snooping is set to forward DHCP client requests on all ports in the VLAN.The "DHCP Broadcast Mode" set to 'All'under the DHCP Global Configuration indicates that DHCP client requests are allowed to broadcast across all ports within the VLAN. This setting is essential for environments needing broad DHCP client servicing across multiple access ports without restriction, facilitating network connectivity and management.

Page 452 of 7.2 study guide, specifically states "Although you can use the sniffer command to capture traffic on switch ports, the types of packets capture by the sniffer are very limited.

The use of the sniffer command on FortiSwitch CLI can be unreliable on port 23 for specific reasons related to the nature of traffic on the port:

D.The switch port might be used as a trunk member.When a switch port is configured as a trunk, it can carry traffic for multiple VLANs. If the sniffer is set up without specifying VLAN tags or a range of VLANs to capture, it may not accurately capture or display all the VLAN traffic due to the volume and variety of VLAN-tagged packets passing through the trunk port. This limitation makes using the sniffer on a trunk port unreliable for capturing specific VLAN traffic unless properly configured to handle tagged traffic.

References:

For guidelines on how to properly use sniffer commands on trunk ports and configure VLAN filtering, consult the FortiSwitch CLI reference available through Fortinet support channels, including theFortinet Knowledge Base.

Pag 232, FortiSwitch_7.2_Study_Guide-Online "However, if you want to authenticate each device behind a port, and optionally, grant each device a different access level based on the credentials provided, then MAC-based is required."

A FortiLink interface must be enabled on FortiGate (A): To manage a FortiSwitch stack, a dedicated FortiLink interface on the FortiGate is required. This interface is used to manage the communication between FortiGate and the FortiSwitch stack, enabling centralized control and configuration of the switches directly from the FortiGate.

The switch controller feature must be enabled on FortiGate (B): Enabling the switch controller feature on FortiGate allows it to manage connected FortiSwitch units. This feature provides tools and interfaces on the FortiGate for overseeing FortiSwitch configurations, monitoring switch status, and managing network policies across the stack.

Layer 3 routing can be configured on FortiSwitch, while managed by FortiGate (D): FortiSwitch, when managed by FortiGate, supports Layer 3 routing capabilities. This allows for routing between VLANs directly on the switch, enhancing network efficiency by reducing theneed to pass traffic through higher network layers for inter-VLAN communication. This configuration enables more sophisticated network setups and efficient routing directly at the switch level.

Switch-controller-dhcp-snooping-verify-mac verifies the destination MAC address to protect against DHCP exhaustion attacks (B): This feature of DHCP snooping helps prevent DHCP exhaustion attacks by ensuring that the destination MAC addresses in DHCP packets match the MAC addresses learnedby the switch. This check helps prevent attackers from overwhelming the DHCP server with requests from spoofed MAC addresses.

Settings related to DHCP option 82 are only configurable through the CLI (D): DHCP Option 82 is used for "agent information," and it's typically used in network environments where additional information between DHCP clients and servers is necessary for policy and billing purposes. Configuration of these settings in FortiSwitch is only available through the Command Line Interface (CLI), not the Graphical User Interface (GUI).