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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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LEARN ABOUT CENTOS

ppi::token::quotelike

PPI::Token::QuoteLike(3)				User Contributed Perl Documentation				  PPI::Token::QuoteLike(3)

NAME

       PPI::Token::QuoteLike - Quote-like operator abstract base class

INHERITANCE

	 PPI::Token::QuoteLike
	 isa PPI::Token
	     isa PPI::Element

DESCRIPTION

       The "PPI::Token::QuoteLike" class is never instantiated, and simply provides a common abstract base class for the five quote-like operator
       classes. In PPI, a "quote-like" is the set of quote-like things that exclude the string quotes and regular expressions.

       The subclasses of "PPI::Token::QuoteLike" are:

       qw{} - PPI::Token::QuoteLike::Words
       `` - PPI::Token::QuoteLike::Backtick
       qx{} - PPI::Token::QuoteLike::Command
       qr// - PPI::Token::QuoteLike::Regexp
       <FOO> - PPI::Token::QuoteLike::Readline

       The names are hopefully obvious enough not to have to explain what each class is. See their pages for more details.

       You may note that the backtick and command quote-like are treated separately, even though they do the same thing. This is intentional, as
       the inherit from and are processed by two different parts of the PPI's quote engine.

SUPPORT

       See the support section in the main module.

AUTHOR

       Adam Kennedy <adamk@cpan.org>

COPYRIGHT

       Copyright 2001 - 2011 Adam Kennedy.

       This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

       The full text of the license can be found in the LICENSE file included with this module.

perl v5.16.3							    2011-02-26						  PPI::Token::QuoteLike(3)
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