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Question 1 - NSE8_812 discussion

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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?

A.
1 redundant packet for every 10 base packets
Answers
A.
1 redundant packet for every 10 base packets
B.
3 redundant packet for every 5 base packets
Answers
B.
3 redundant packet for every 5 base packets
C.
2 redundant packet for every 8 base packets
Answers
C.
2 redundant packet for every 8 base packets
D.
3 redundant packet for every 9 base packets
Answers
D.
3 redundant packet for every 9 base packets
Suggested answer: B

Explanation:

Forward Error Correction (FEC) is a feature that can improve the quality of SD-WAN network traffic by adding redundant packets to the original packets. The ratio of redundant packets to base packets is determined by the FEC mode, which can be set to low, medium, or high. In low mode, the ratio is 1:10, in medium mode, the ratio is 2:8, and in high mode, the ratio is 3:5. The FEC mode can be configured manually or automatically based on the bandwidth and packet loss of the network. In this case, since the download bandwidth is 500 Mbps and the packet loss is 8%, the FEC mode is automatically set to high, which means that 3 redundant packets are added for every 5 base packets.

Reference: https://docs.fortinet.com/document/fortigate/7.0.0/sd-wan/19662/forward-errorcorrection-fec

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asked 18/09/2024
antoine sala
35 questions
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