Explanation
According to the exhibit, the debug output shows that the device connected to port2 on FortiSwitch is sending an EAPOL-Start message, which is the first step of the 802.1X authentication process. However, the output also shows that the device is not sending any EAP-Response messages, which are required to complete the authentication process. Therefore, option A is true because the device is not configured for 802.1X authentication, which means that it does not have the correct credentials or settings to authenticate with the RADIUS server. Option D is also true because the device does not support 802.1X authentication, which means that it does not have the capability or software to perform 802.1X authentication. Option B is false because the device has not been quarantined for 3600 seconds, but rather has a session timeout of 3600 seconds, which is the default value for 802.1X sessions. Option C is false because the device has not been assigned the guest VLAN, but rather has been assigned the default VLAN, which is VLAN 1.

Explanation
According to the FortiGate Administration Guide, "MAC address quarantine by redirect mode allows you to quarantine devices by adding their MAC addresses to a firewall address group called Quarantined Devices.
The quarantined devices are kept in their current VLANs, but their traffic is redirected to a quarantine portal." Therefore, options B and D are true because they describe the statements about MAC address quarantine by redirect mode. Option A is false because the quarantined device is not moved to the quarantine VLAN, but rather kept in the current VLAN. Option C is false because redirect mode is not the default mode for MAC address quarantine, but rather an alternative mode that can be enabled by setting mac-quarantine-mode to redirect.
https://docs.fortinet.com/document/fortiap/7.0.0/configuration-guide/734537/radius-authenticated-dynamic-vlan-: https://docs.fortinet.com/document/fortigate/7.0.0/administration-guide/734537/mac-address-quarantine

Explanation
According to the exhibit, the DHCP server scope for the FortiLink interface has a vci-string setting with the value "Cisco AP c2700". This setting is used to match the vendor class identifier (VCI) of the DHCP clients that request an IP address from the DHCP server. The VCI is a text string that uniquely identifies a type of vendor device. Therefore, option C is true because the vci-string setting restricts the IP address assignment to FortiSwitch and FortiExtender devices, which use the VCI "Cisco AP c2700". Option A is false because the vci-string setting does not ignore DHCP requests coming from FortiSwitch and FortiExtender devices, but rather accepts them. Option B is false because the vci-string setting does not reserve IP addresses for FortiSwitch and FortiExtender devices, but rather assigns them dynamically. Option D is false because the vci-string setting does not restrict the IP address assignment to devices that have FortiSwitch or FortiExtender as their hostname, but rather to devices that have "Cisco AP c2700" as their VCI.

Explanation
According to the FortiAP Configuration Guide, "Channel utilization measures how busy a channel is over a given period of time. It includes both Wi-Fi and non-Wi-Fi interference sources. A high channel utilization indicates a congested channel and can result in poor wireless performance. The recommended maximum utilization value that an interface should not exceed is 65%." Therefore, option D is true because it gives the recommended maximum utilization value for an interface in the 5 GHz range. Options A, B, and C are false because they give higher utilization values that can cause poor wireless performance.
https://docs.fortinet.com/document/fortiap/7.0.0/configuration-guide/734537/wireless-radio-settings#channel-uti

Explanation
According to the FortiGate Administration Guide, "To use an external captive portal, you must configure a user group that uses the external captive portal as the authentication method and apply it to a firewall policy." Therefore, option C is true because it will allow the wireless users to be redirected to the external captive portal URL when they try to access the Internet. Option A is false because disabling the user group from the SSID configuration will prevent the wireless users from being authenticated by the FortiGate device. Option B is false because enabling the captive-portal-exempt option in the firewall policy will bypass the captive portal authentication for the wireless users, which is not the desired outcome. Option D is false because including the wireless client subnet range in the Exempt Source section will also bypass the captive portal authentication for the wireless users, which is not the desired outcome.