|
|
|
| hi,
it should be pretty simple but
i am a bit confused with 2 different views/answers...here is the question.
Which type of Protocol requires an Application to request retransmission of corrupt or missing packets.
connection-oriented or connectionless.
boson says connectionless, but i think connection oriented because there is no retransmission in connectionless....in another test it was connectionless too.
any opinions?
thanks | |
|
| connectionless, that's why it needs the APP to request... and not do it themselves. | |
|
| hey javad sorry its off the subject but where did your post about bcran go. I wanted to read it. | |
| darthfeces 2002-08-11, 8:30 pm |
| that would be udp | |
| mabrouk 2002-08-12, 8:10 am |
| Definitely "Connectionless" is the correct choice.But...
The word "requires" in the question text is a bit confusing for me.
Because I am not aware of any mechanism a connectionless protocol, say UDP, may use to "require" anything from an above running application.
Error-recovery is achieved by the application running on top of a connectionless protocol and this happens only if the manufacturer decides to implement this feature.
It is not a function of a "connectionless protocol" to "require" .
That is why I do not fully agree with the wording of the question. | |
| darthfeces 2002-08-12, 10:25 am |
| in "connection oriented" communications tcp takes care of everything related to transmission of segments.
"connectionless" udp relies on the appications talking accross it.
the question is crap. | |
| chodan 2002-08-13, 5:57 am |
| I think the question implies that if "request retransmission of corrupt or missing packets" is needed then a conectionless protocol "like IP or udp for instance"
must rely on a higher layer. | |
| marathoner 2002-08-13, 8:57 am |
| they should hire you to write or rewrite the exams chodan. Your way makes it plain. But I think the point of the obtuse questions is to cause pain. | |
|
| thanks guys, i think i should go with all of you 
ok, another question :
what are the 2 most important fields to use for troubleshooting in the debug isdn q931 output
1. call ref field
2. disconnect code field
3. channel id
4. cause code field.
analysing the importance given by CCO i would go with 1 & 2 but i am still not sure.
any guesses | |
|
| I believe its 1 and 4.
I am pretty sure its cause code. It would display *disconnect* then by the cause code, not disconnect code.
could be wrong... my exposure to isdn is quite limited... |
|
|
|