[SIPForum-discussion] TCP vs RTP

[alexzhang at gdnt.com.cn]

Hi Lokesh,
 
My question is: If RTP is based on the connectionless Oriented, can we
say this protocol is only applicable to the Audio and video
transporation? If we want to transfer data without any possible loss, is
it reliable to use RTP?
 
-- A l e x
 

________________________________

From: discussion-bounces at sipforum.org
[mailto:discussion-bounces at sipforum.org] On Behalf Of lokesh agrawal
Sent: Monday, April 23, 2007 4:33 PM
To: discussion at sipforum.org
Subject: Re: [SIPForum-discussion] TCP vs RTP


Hi,
 
First of all let me tell you that TCP and RTP both are both different
purpose.
VoIP data packets live in RTP (Real-Time Transport Protocol) packets
which are inside UDP-IP packets
TCP is more making/terminating connections and RTP is for payloads and
data packets. 
 
VOIP data packets uses UDP, RTP and IP protocols for operation.
We can use TCP(Connection Oriented) in place of UDP(connectionless) but
VoIP doesn't use TCP because it is too heavy for real time applications
and for voice it will add delay in packets as it needs ACK for each and
every packet. 
 
 
Regards
Lokesh Agrawal
Persistent Systems Pvt. Ltd.

 
On 4/23/07, William Prusty <williamp at techmahindra.com> wrote: 

	Whether TCP is capable to carry AUDIO , VIDEO data ?? if yes
then why we are using RTP in SIP to carry  AUDIO , VIDEO data

	 

	 

	 

	 

	Plz answer .

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