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Full Discussion: Doubt in networklayer
Special Forums IP Networking Doubt in networklayer Post 302894617 by Corona688 on Wednesday 26th of March 2014 11:56:13 AM
Old 03-26-2014
Quote:
Originally Posted by baker
great , now i am getting to it ..

but my understanding was , from transport to network layer , the only data that passing is TCPheader+data , and in this IP address is not available though.
The layers are inside each other, like a Matryoshka. The data link layer doesn't understand the Transport Layer data, but it's there nonetheless.

You might consider a packet to be a wad of data which looks like this:
Quote:
Data Link Layer(usually Ethernet)
Quote:
Network Layer
Quote:
Transport Layer
Quote:
Payload
It usually gets passed around whole. OSI might speak of peeling layers but that's a metaphor; if it's a signal going over a wire, it's going to be transmitted whole.

Last edited by Corona688; 03-26-2014 at 01:49 PM..
 

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page_util_quote(n)					      Parser generator tools						page_util_quote(n)

__________________________________________________________________________________________________________________________________________________

NAME
page_util_quote - page character quoting utilities SYNOPSIS
package require page::util::quote ?0.1? package require snit ::page::util::quote::unquote char ::page::util::quote::quote'tcl char ::page::util::quote::quote'tclstr char ::page::util::quote::quote'tclcom char _________________________________________________________________ DESCRIPTION
This package provides a few utility commands to convert characters into various forms. API
::page::util::quote::unquote char A character, as stored in an abstract syntax tree by a PEG processor (See the packages grammar::peg::interpreter, grammar::me, and their relations), i.e. in some quoted form, is converted into the equivalent Tcl character. The character is returned as the result of the command. ::page::util::quote::quote'tcl char This command takes a Tcl character (internal representation) and converts it into a string which is accepted by the Tcl parser, will regenerate the character in question and is 7bit ASCII. The string is returned as the result of this command. ::page::util::quote::quote'tclstr char This command takes a Tcl character (internal representation) and converts it into a string which is accepted by the Tcl parser and will generate a human readable representation of the character in question. The string is returned as the result of this command. The string does not use any unprintable characters. It may use backslash-quoting. High UTF characters are quoted to avoid problems with the still prevalent ascii terminals. It is assumed that the string will be used in a double-quoted environment. ::page::util::quote::quote'tclcom char This command takes a Tcl character (internal representation) and converts it into a string which is accepted by the Tcl parser when used within a Tcl comment. The string is returned as the result of this command. BUGS, IDEAS, FEEDBACK This document, will undoubtedly contain bugs and other problems. Please report such in the category page of the Tcllib SF Trackers [http://sourceforge.net/tracker/?group_id=12883]. Please also report any ideas for enhancements you may have. KEYWORDS
page, parser generator, quoting, text processing CATEGORY
Page Parser Generator COPYRIGHT
Copyright (c) 2007 Andreas Kupries <andreas_kupries@users.sourceforge.net> page 1.0 page_util_quote(n)
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