Ping Test to determine Optimal MTU and MSS Size

1440 Max packet size from Ping Test
+ 28 IP and ICMP headers
1468 is your optimum MTU Setting
Normally, MSS is equal to MTU minus 40

References
https://kb.netgear.com/19863/Ping-Test-to-determine-Optimal-MTU-Size-on-Router
http://www.tp-link.com/us/FAQ-190.html
https://forum.peplink.com/t/how-to-determine-the-optimal-mtu-and-mss-size/7895

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