Re: The "Presentation" Layer

[john e <jacobus1968@xxxxxxxxxxx>]

No, i haven't done anything with JXTA. Just interested.

> Date: Fri, 18 Jul 2008 09:10:50 -0500
> From: aaronbartell@xxxxxxxxx
> To: web400@xxxxxxxxxxxx
> Subject: Re: [WEB400] The "Presentation" Layer
>
> Oh man, that explanation (which I haven't heard described before) really has
> the wheels turning in my head.  Kinda makes a guy rethink some ideas I had
> formalized.
>
> Have you done any JXTA implementations? And if so what was the scenario?
>
> Aaron Bartell
> http://mowyourlawn.com
>
>
> On Fri, Jul 18, 2008 at 8:37 AM, john e <jacobus1968@xxxxxxxxxxx> wrote:
>
> > P2P is when the two sides on a connection can be either a client, a server,
> > or both. Specifically, client/server is an architectural approach which is
> > simple, robust, and scalable (i never said client/server is a bad thing).
> >
> > By designating a specific role (client or server) to each side it makes
> > implementing a scalable and robust distributed app simple. A client always
> > initiates a request to the server, and a server simply processes requests. A
> > client also typically knows the address of the server wher to send the
> > requests to.
> >
> > If you have simply TCP/IP, you actually have a peer-to-peer network. Each
> > program can connect to any other program and take on whichever role. But
> > distributing code over different processes which are "peers" (i.e. they are
> > equal) is more difficult to implement.
> >
> > You can say that APPN is peer-to-peer and TCP/IP is not, because APPN
> > implements additional functionality that is specifically for peer-to-peer
> > networking such as discovery of neighbor peers. In TCP/IP you have to
> > implement this yourself with e.g. UDP. In APPN, the LU6.2 logical unit is
> > the "peer" on the network. LU6.2 supports different protocols for dealing
> > with peer-to-peer networking.
> >
> > A green-screen terminal is also a peer in the network, but in practice it
> > acts more as a server, and the program running on the host is the client.
> > E.g. the program requests the terminal to display a format. So most of the
> > time a terminal takes on the server role. However, at first, when logging
> > into the system, a terminal initiates a session and has the client role.
> -- 
> This is the Web Enabling the AS400 / iSeries (WEB400) mailing list
> To post a message email: WEB400@xxxxxxxxxxxx
> To subscribe, unsubscribe, or change list options,
> visit: http://lists.midrange.com/mailman/listinfo/web400
> or email: WEB400-request@xxxxxxxxxxxx
> Before posting, please take a moment to review the archives
> at http://archive.midrange.com/web400.

_________________________________________________________________
De mooiste afbeeldingen van Angelina Jolie vind je met Live Search
http://search.live.com/images/results.aspx?q=angelina%20jolie&FORM=MIINTM