Network Security Expert 8 Written Exam: NSE8_812

Correct Answer: C

Explanation: The FEC configuration in the exhibit specifies that if the packet loss is greater than 10%, then the FEC mapping will be 8 base packets and 2 redundant packets. The download bandwidth of 500 Mbps is not greater than 950

Mbps, so the FEC mapping is not overridden by the bandwidth setting. Therefore, the FEC behavior will be 2 redundant packets for every 8 base packets.

Here is the explanation of the FEC mappings in the exhibit:

Packet loss greater than 10%: 8 base packets and 2 redundant packets. Upload bandwidth greater than 950 Mbps: 9 base packets and 3 redundant packets.

The mappings are matched from top to bottom, so the first mapping that matches the conditions will be used. In this case, the first mapping matches because the packet loss is greater than 10%. Therefore, the FEC behavior will be 2

redundant packets for every 8 base packets.

Reference: https://docs.fortinet.com/document/fortigate/7.0.0/new- features/169010/adaptive-forward-error-correction-7-0-2

Correct Answer: C

Explanation: The FortiGate 6000F has 24 1/10/25-Gbps SFP28 data network interfaces (1 to 24). These interfaces are divided into the following interface groups: 1 to 4, 5 to 8, 9 to 12, 13 to 16, 17 to 20, and 21 to 24. The ports 25 to 28 are

40/100-Gbps QSFP28 data network interfaces.

The initial connection should be made to any interface between ports 1 to 4. This is because the ports 21 to 24 are part of the same interface group, and changing the speed of one of these ports will affect the speeds of all of the ports in the

group. The ports 5 to 8 are also part of the same interface group, so they should not be used for the initial connection. The new hardware module that will be installed in the switch will provide higher speed ports. When this module is installed,

the speed of the ports 21 to 24 will be increased. However, this will not affect the ports 1 to 4, because they are not part of the same interface group.

Therefore, the initial connection should be made to any interface between ports 1 to 4, in order to ensure that the FortiGate interface connected to the switch does not affect any other port when the new module is installed and the new port

speed is defined.

Reference:

FortiGate 6000F Front Panel Interfaces: https://docs.fortinet.com/document/fortigate- 6000/hardware/fortigate-6000f-system-guide/827055/front-panel-interfaces

Correct Answer: BE

Explanation: The CLI output shown in the exhibit indicates that FortiWeb has enabled IP Reputation feature with local techniques enabled and geographical IP policies enabled after local techniques (set geoip-policy-order after-local). IP Reputation feature is a feature that allows FortiWeb to block or allow traffic based on the reputation score of IP addresses, which reflects their past malicious activities or behaviors. Local techniques are methods that FortiWeb uses to dynamically update its own blacklist based on its own detection of attacks or violations from IP addresses (such as signature matches, rate limiting, etc.). Geographical IP policies are rules that FortiWeb uses to block or allow traffic based on the geographical location of IP addresses (such as country, region, city, etc.). Therefore, based on the output, one correct statement is that attackers can be blocked before they target the servers behind the FortiWeb. This is because FortiWeb can use IP Reputation feature to block traffic from IP addresses that have a low reputation score or belongto a blacklisted location, which prevents them from reaching the servers and launching attacks. Another correct statement is that reputation from blacklisted IP addresses from DHCP or PPPoE pools can be restored. This is because FortiWeb can use local techniques to remove IP addresses from its own blacklist if they stop sending malicious traffic for a certain period of time (set local-techniques-expire-time), which allows them to regain their reputation and access the servers. This is useful for IP addresses that are dynamically assigned by DHCP or PPPoE and may change frequently. References: https://docs.fortinet.com/document/fortiweb/6.4.0/administration-guide/19662/ip- reputationhttps://docs.fortinet.com/document/fortiweb/6.4.0/administration- guide/19662/geographical-ip-policies