nse8_812 Exam - Question 1

Question

Review the VPN configuration shown in the exhibit. What is the Forward Error Correction behavior if the SD-WAN network traffic download is 500 Mbps and has 8% of packet loss in the environment?

Examice · Accepted Answer

The FEC configuration in the exhibit specifies different parameters for FEC mapping based on packet loss and bandwidth thresholds. Since the download bandwidth of 500 Mbps does not exceed any bandwidth thresholds and the packet loss is at 8%, which is greater than the packet-loss-threshold of 10%, the first FEC mapping rule applies. Therefore, the FEC behavior will be 2 redundant packets for every 8 base packets.

arielon · Answer

It's A."The FEC base and redundant values are used when the link quality has not exceeded the limits specified in the FEC profile mapping"

Davidrichard · Answer

B is correct

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

ac89l · Answer

you should review this:
https://docs.fortinet.com/document/fortigate/7.0.11/cli-reference/367620/config-vpn-ipsec-fec
bandwidth-bi-threshold: Apply FEC parameters when available bi-bandwidth is >= threshold
So it is "greater or equal" 
So if equal , then B is correct.

node345 · Answer

5000000 Kbps are 5Gbps and not 500Mbps. Correct answer is A.

HongHCMC · Answer

A is correct as 500Mbps has not exceeded 5000000 (5G) specified in the profile

ama6 · Answer

Correct is C :

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

BozoPin · Answer

Excactly that, what arielon wrote

re_j0hn · Answer

B is correct.

BB_norway · Answer

Can someone who took the exam recently confirm if those questions are still valid as of April 2024?

nse8_812 Exam - Question 1

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