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TCP window scale option is needed for efficient transfer of data when the bandwidth-delay product (BDP) is greater than 64 KB [1].For instance, if a T1 transmission line of 1.5 Mbit/s was used over a satellite link with a 513 millisecond round-trip time (RTT), the bandwidth-delay product is ,, =, bits or about 96,187 bytes.
Size (bytes) Windows BITMAPINFOHEADER [2] 0E: 14 4 the size of this header, in bytes (40) 12: 18 4 the bitmap width in pixels (signed integer) 16: 22 4 the bitmap height in pixels (signed integer) 1A: 26 2 the number of color planes (must be 1) 1C: 28 2 the number of bits per pixel, which is the color depth of the image.
Window: 16 bits The size of the receive window, which specifies the number of window size units [b] that the sender of this segment is currently willing to receive. [c] (See § Flow control and § Window scaling.) Checksum: 16 bits The 16-bit checksum field is used for error-checking of the TCP header, the payload and an IP pseudo-header.
The TCP header uses a 16 bit field to report the receiver window size to the sender. Therefore, the largest window that can be used is 2 16 = 64 kilobytes. In slow-start mode, the transmitter starts with low packet count and increases the number of packets in each transmission after receiving acknowledgment packets from receiver.
The HTTP2-Settings header field is a connection-specific header field that includes parameters that govern the HTTP/2 connection, provided in anticipation of the server accepting the request to upgrade. [19] [20] HTTP2-Settings: token64: Obsolete RFC 7540, 9113: If-Match
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Checksum is the 16-bit ones' complement of the ones' complement sum of a pseudo header of information from the IP header, the UDP header, and the data, padded with zero octets at the end (if necessary) to make a multiple of two octets. [7] In other words, all 16-bit words are summed using ones' complement arithmetic. Add the 16-bit values up.