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The window scale value can be set from 0 (no shift) to 14. The window scale value represents the number of bits to left-shift the 16-bit window size field. The window scale option is used only during the TCP three-way handshake. TCP window scale is an option used to increase the maximum window size from 65,535 bytes to 1 Gigabyte. Since the size field can't be expanded, a scaling factor is used. The TCP window size field controls the flow of data and is limited to 2 bytes, or a window size of 65,535 bytes. CHECKSUM CALCULATOR DESTINATION PORT LENGTH WINDOWSWindows scalingįor more efficient use of high-bandwidth networks, a larger TCP window size may be used. The following list shows each TCP option kind, length, name, and description.ĭescription: Used when padding is needed for the last TCP option.ĭescription: Used when padding is needed and more TCP options follow within the same packet.ĭescription: Indicates the maximum size for a TCP segment that can be sent across the network.ĭescription: Identifies the scaling factor to be used when using window sizes larger than 64k.ĭescription: Used to help calculate the Round Trip Time (RTT) of packets transmitted.ĭescription: Informs other hosts that Selective Acks are permitted.ĭescription: Used by hosts to identify whether out-of-order packets were received. CHECKSUM CALCULATOR DESTINATION PORT LENGTH SERIES
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