Dale, this is the dark side of the certification frenzy. Too many places
hiring too many people to write too many practice tests using too many
sources with accurate and inaccurate information, not to mention inadequate
understanding. The result is much confusion.
For example, is it an OSPF database, or an OSPF table? Is UDP layer 4 or
layer 7 ( as I have seen argued ) Is ethernet connection oriented or
connectionless? Is Cisco frame relay standards based or proprietary? ( saw
that question on one of the Boson tests )
All anyone can do is study the material, and if confused ask the question.
Lord knows I've sure had a lot of my own confusion cleared up by following
topics just like this one.
Chuck
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] On Behalf Of Dale
Holmes
Sent: Friday, July 28, 2000 1:19 PM
To: [EMAIL PROTECTED]; [EMAIL PROTECTED]
Subject: Re: a ccna question-help
Wow - what a crappy question! Where did you find it?
It really confuses the issue to say "connection-oriented" with respect to
these specifications (except *maybe* ATM). For FDDI and Token Ring, it is
better to say that they are "deterministic" (as opposed to "opportunistic"
in the case of Ethernet).
Consider a Token Ring. When a station wants to transmit data, it must first
obtain the token. Once it does so, it can then transmit its data. The data
frame traverses the ring, visiting every station on the ring. The
destination station receives the data, then set the Address Recognized (AR)
and Frame Copied (FC) bits, and then sends the data back out on the ring.
The originating station will see it's own frame "coming back around" the
ring, this time with the AR and FC bits set, and will strip the frame off
the ring and release a new token.
This process looks kinda "connection-oriented" - almost like a transmission
(sending the data) and an acknowledgement (flipping the AR and FC bits), but
it is really not the same thing (though some might argue that I am splitting
hairs).
At any rate, I say the question you got is poorly written at best... though
sometimes the really bad questions force you down roads you otherwise would
not have travelled, and you become more knowledgable as you prove the author
an idiot... Who knows, I probably wrote that lousy question!
>From: "Ed Moss" <[EMAIL PROTECTED]>
>Reply-To: "Ed Moss" <[EMAIL PROTECTED]>
>To: [EMAIL PROTECTED]
>Subject: Re: a ccna question-help
>Date: Fri, 28 Jul 2000 14:15:49 -0500
>
>It may be how you look at it... looking at "select the best answer" - I say
>ATM, Token Ring and FDDI. These require single point-to-point connections.
>
>I believe Ethernet and Frame Relay (NBMA) are multiaccess mediums.
>
>The question it self may be a bit confusing as well since it says
>"protocols". these are all physical mediums and not specifically
>protocols.
>
>Ed
>
>
> > I find a confused question on an exam guide which is:
> > select the connect-oriented protocols:
> > 1.ATM
> > 2.TOKEN RING
> > 3.FDDI
> > 4.Ethernet
> > 5.FrameRelay
>
>
>
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