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The TCP header padding is used to ensure that the TCP header ends, and data begins, on a 32-bit boundary. The padding is composed of zeros. [16] Options have up to three fields: Option-Kind (1 byte), Option-Length (1 byte), Option-Data (variable). The Option-Kind field indicates the type of option and is the only field that is not optional.
The header is followed by the token value (0 to 8 bytes) which may be followed by a list of options in an optimized type–length–value format. Any bytes after the header, token and options (if any) are considered the message payload, which is prefixed by the one-byte "payload marker" (0xFF).
Nevow (pronounced like the French nouveau) is a Python web application framework originally developed by the company Divmod. Template substitution is achieved via a small Tag Attribute Language , which is usually embedded in on-disk XML templates, though there is also a pure-Python domain-specific language called Stan, for expressing this ...
An application can communicate with a remote process by exchanging data with TCP/IP by knowing the combination of protocol type, IP address, and port number. This combination is often known as a socket address. It is the network-facing access handle to the network socket.
Van Jacobson compression reduces the normal 40 byte TCP/IP packet headers down to 3–4 bytes for the average case; it does this by saving the state of TCP connections at both ends of a link, and only sending the differences in the header fields that change.
Programming a TCP client application involves the following steps: Creating a TCP socket. Connecting to the server ( connect() ), by passing a sockaddr_in structure with the sin_family set to AF_INET , sin_port set to the port the endpoint is listening (in network byte order), and sin_addr set to the IP address of the listening server (also in ...
The compression algorithm used in CSLIP is known as Van Jacobson TCP/IP Header Compression. [5] CSLIP has no effect on the data payload of a packet and is independent of any compression by the serial line modem used for transmission. It reduces the Transmission Control Protocol (TCP) header from twenty bytes to seven bytes.
Template {{APHD}} is used to create augmented packet header diagrams. Template parameters [Edit template data] Parameter Description Type Status table header 1 (start) Generates the header. Example start String suggested offset 1 (numerical) If this parameter is numerical then it is interpreted as the octet offset of this 4 octet-sized table row, which is displayed in the left header. The bit ...