[Csci551-talk] [Q] Another question for the project.

[John Heidemann]

On Wed, 19 Mar 2003 11:41:40 PST, JongAm Park wrote: 
>Hello.
>
>Instead of doing things step by step, I read whole explanation
>to prevent unneccessary work or changing of program structure.
>
>As a result, there is something I'd like to ask.
>
>1. When starting stage 2, 3, and 4, the procedure of stage 1 should
>    be processed. Is it correct? I think it should be.
>    ( So, I didn't make my source code stop at stage 1. )

It will be hard to send routing messages (stage 2) without creating
the routers (stage 1).

But the files to be output is determined by the "stage" line of the
config file.  If that says stage2, you should not create s1.out.

>
>2. The DV message
>
>    There seem to be two message format. One(1) is the one before
>    "... then for each route", and the other(2) is the one after the
>    the phrase.
>
>    However, in some way, they seem to be combined one, not separated.
>    I mean, the (1) should be included basically, and the (2) is added to
>    (1) for routing information it contains. Is this correct?

THere is one DV message format with fixed header and then a number of
route records.  The 2nd part you identify is the route record.

(Actually, there is are two alternatives to the fixed-length header,
one with and without last-hop-id.)

>3. On page 4, above the line, messsages-sent A, messages-received B...,
>     there is a sentence, "After each version of the routing table.. ".
>    Actually, each router send and receive continuously. Not "sending
>    this, this and this, and receive this,this and this, and I finished
>    step 1." So.. what is the definition of the term, "version"?
>    If a routing table is updated, or chaged, is it considered a
>    "version"?

Yes.

>4. On page 2, "The sender must sent a timer.. ".
>    Doesn't the timer ticks on the sender side and check if ACK is
>    received before timeout?

That should be "must SET at timer".

   -John Heidemann

>
>I'm sorry for lots of questions.
>Maybe I have no enough time to do the homework.
>
>Thank you.
>
>
>
>-- 
>"Try not to become a man of success but rather to become a man of value."
>      -- A. Einstein
>
>=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=++=+=+=+=
>JongAm Park                             http://my.dreamwiz.com/jongam
>jongam@myrealbox.com                    MSN : jongampark@hotmail.com
>Tel)213-251-9592                         ICQ : 32697214
>H.P)213-820-8943                        AIM : JongAm