For optimum communications, the number of bytes in the data segment and the header must add up to less than the number of bytes in the maximum transmission unit (MTU).
The same should be handled before being passed from a router.
*Here is the process to follow:
enable
configure terminal
interface type number
ip tcp adjust-mss max-segment-size 500 to 1460
ip mtu bytes
Hope it helps you understand the term.
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Parvesh
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