>question 1 - at what level of detail do you wish to learn?
>
>For X.25, there is the CCITT specification (watch URL wrap)
>http://www.itu.int/rec/recommendation.asp?type=folders&lang=e&parent=T-REC-X
>.25
>for ATM, there is the ATM Forum Specification
>(http://www.atmforum.com)
>for Frame Relay, there is the Frame Relay Forum Specification
>(http://www.frforum.com/)
All good references, and there also are corresponding RFCs for the
relationship of IP to them. Yet another level of detail gets into WHY
the protocols are designed the way they are, since these
specifications tell HOW they are defined.
I do spend a good deal of time in my "Designing Addressing
Architectures" book discussing how lower layer addressing relates to
layer 3 addressing.
You can go to the IETF page, navigate to working groups, and look
around in the sub-IP temporary area to see how there's an attempt to
come up with a unifying way how all these things relate to IP
(including MPLS, GMPLS, POS, etc.)
The Frame Relay Forum, in particular, tends to have well-written
documents. Indeed, there tends to be a "forum" for most new layer
1-2 technologies, such as DSL or metro Ethernet. You can also browse
to IEEE's site and find quite a bit about things like Resilient
Packet Rings (802.17)--that's really still in the design phase, so
there are a lot of presentations about different choices in the
design. IEEE people tend to do much more readable powerpoint that in
the IETF!
>
>question 2 - have you done a search on the web for any of those topics?
>Here are some sample hits from google:
>X.25
>http://www.cis.ohio-state.edu/~jain/cis777-99/g_4x25.htm
>asynchronous transfer mode
>http://cne.gmu.edu/modules/atm/Texttut.html
>Frame Relay
>http://www.alliancedatacom.com/frame-relay-tutorials.asp
>Don't forget about digital subscriber line (DSL), too
>http://www.iec.org/online/tutorials/adsl/
>
>
>----- Original Message -----
>From: "thinkworker"
>To:
>Sent: Friday, September 07, 2001 9:13 PM
>Subject: Is there any good books recommanded for lower 2 layers? [7:19087]
>
>
>> I am trying to learn more about the lower 2 layer tech like
>> X.25, ATM, Frame Relay in more detail. Is there any good books
>> recommanded? I am reading a book named "emerging communications
>> technologies 2nd editon" of Uyless Black, and I think it is only an
>> overview of the topics.
>>
> > Thanks!
Message Posted at:
http://www.groupstudy.com/form/read.php?f=7&i=19126&t=19092
--------------------------------------------------
FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html
Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
