At 11:09 AM 2/8/01, Jeremy Dumoit wrote:
> Hi Priscilla,
>
> I like your book very much!!
Thanks.
> Actually, I was
>trying to figure out if any LAN protocols use it. For
>instance 802.3 frames include an 802.2 type 2 header
If the upper layer is NetBEUI or SNA, then 802.3 frames include an 802.2
type 2 header. Type 2 is connection-oriented. It includes sequence numbers,
flow control, etc. It uses a four-byte header. (The control field is two
bytes.)
When IP, IPX, or AppleTalk run on top of 802.3, they use the connectionless
type 1 802.2. It uses a three-byte header.
IP usually uses Ethernet V2, actually.
PPP is similar to connectionless type 1 802.2, as you say.
Priscilla
>before the data field. I guess PPP uses this, or some
>for of type 1 LLC.
>
> Thanks!
>
> Jeremy
>--- Priscilla Oppenheimer <[EMAIL PROTECTED]> wrote:
> > You are applying the OSI layering model upside down
> > with this question. You
> > should be asking if there is any network-layer
> > protocol that uses the LLC 1
> > service at the data-link layer. And the answer is
> > yes. IP, Novell,
> > AppleTalk, etc. use LLC 1 if they use LLC at all.
> > (They can all use
> > Ethernet V2; see the discussion on 802.3 for more
> > info on that!)
> >
> > NetBEUI uses LLC type 2. SNA uses LLC type 2.
> >
> > Priscilla
> >
> > At 09:17 AM 2/8/01, Jeremy Dumoit wrote:
> > > Anyone know if there's a LAN type out there
> > that
> > >uses LLC type 1 headers?
> > >
> > > Thanks,
> > >
> > > JD
> > >
> > >__________________________________________________
> > >Do You Yahoo!?
> > >Get personalized email addresses from Yahoo! Mail -
> > only $35
> > >a year! http://personal.mail.yahoo.com/
> > >
> > >_________________________________
> > >FAQ, list archives, and subscription info:
> > >http://www.groupstudy.com/list/cisco.html
> > >Report misconduct and Nondisclosure violations to
> > [EMAIL PROTECTED]
> >
> >
> > ________________________
> >
> > Priscilla Oppenheimer
> > http://www.priscilla.com
>
>
>__________________________________________________
>Do You Yahoo!?
>Get personalized email addresses from Yahoo! Mail - only $35
>a year! http://personal.mail.yahoo.com/
________________________
Priscilla Oppenheimer
http://www.priscilla.com
_________________________________
FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html
Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
