Quoting from the RFC 3261::
Making TCP mandatory for the UA is a substantial change from RFC
2543. It has arisen out of the need to handle larger messages,
^^^^^^^^^^^^^^^^^^^^^^^
which MUST use TCP, as discussed below. Thus, even if an element
never sends large messages, it may receive one and needs to be
able to handle them.
However, TCP is needed for TLS. [for the size consideration, the MTU that is
in 3261 is quite okay type for all situation, (i am only guessing !!)] TLS
looks like inevitable requirement today for tomorrow.
--Vijay
On 9/9/05, Uttam Kumar Sarkar <[EMAIL PROTECTED]> wrote:
>
> It's for the secuirity.
>
> -----Original Message-----
> From: Poojan Tanna [mailto:[EMAIL PROTECTED]
> Sent: Friday, September 09, 2005 7:54 AM
> To: sip-implemetors
> Subject: [Sip-implementors] SIP: TCP Vs UDP.
>
>
> Hi,
>
> I am trying to understand as to what are the advantages of running SIP on
> TCP as transport layer compared to UDP.
>
> SIP as a protocol more or less handles retransmission of request. Is there
> any added advantage compared to running SIP on UDP.
>
> Thanks,
> Poojan.
>
>
>
>
>
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