First of all, I'm sorry as I'm asking very basic ques. but I didnt
find any satisfactory answer of it.
I want to know which protocol we should use for voice data transfer
and for FTP? Should it be TCP or UDP and also please me by
telling the reason.

"Deep" <mail2sukhdeep@gmail.com> writes:
> First of all, I'm sorry as I'm asking very basic ques. but I didnt
> find any satisfactory answer of it.
> I want to know which protocol we should use for voice data transfer
> and for FTP? Should it be TCP or UDP and also please me by
> telling the reason.

FTP uses TCP. See RFC 959 (for starters).

Voice data typically uses UDP, though other mechanisms are possible.
You'll need to be more specific there, because "voice data transfer"
isn't the name of a particular protocol or implementation.

Good luck on the test. :-/

--
James Carlson, Solaris Networking <james.d.carlson@sun.com>
Sun Microsystems / 1 Network Drive 71.232W Vox +1 781 442 2084
MS UBUR02-212 / Burlington MA 01803-2757 42.496N Fax +1 781 442 1677

"Deep" <mail2sukhdeep@gmail.com> wrote:

> First of all, I'm sorry as I'm asking very basic ques. but I didnt
> find any satisfactory answer of it.
> I want to know which protocol we should use for voice data transfer
> and for FTP? Should it be TCP or UDP and also please me by
> telling the reason.

This is the answer to the homework problem:

1. FTP uses TCP. The reason is that FTP has to transfer files error
free, and that jitter or latency are not a primary concern.

2. Voice or video preferably use UDP. The reason is that a source device
transmits UDP datagram by datagram on its own schedule, with minimal
network-related reasons for disrupting the timing between these
datagrams. This promotes a steadier stream fo datagrams than you might
see with TCP, which is best for streaming media. If an occasional UDP
datagram is lost in transit, the voice or video streams do not usually
care that much. You get an instantaneous glitch, which most people can
ignore (unless loss becomes extreme, in which case even TCP would not
for such streaming media cases). However, Windows Media Player does
give you a lot of options for streaming media, including UDP, TCP, and
HTTP.

Bert

> 2. Voice or video preferably use UDP.

Or at least "real time" (as much as one can call it that) voice/video.
I guess non-realtime voice would be called audio though

rick jones
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