- This topic has 22 replies, 1 voice, and was last updated 19 years, 1 month ago by Abhishek Singh.
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20th July 2005 at 02:35 #29784Gaurav LohiyaGuest
Voice-over-IP (VoIP) is based on the UDP protocol. This is because UDP has a lower overhead than TCP. What is the effective percentage gain in throughput (of any given payload) using UDP vs TCP?
20th July 2005 at 22:15 #29785Tom HowardGuestUDP has an 8 octet header, and TCP usually has a 20 octet header. Both require an IP header and an RTP header, which together add 32 octets.
The percentage difference between UDP and TCP depends on the size of the payload. A 20 octet payload is typical (G.729 with a sample sent every 20ms).
But, that’s not the whole story. TCP takes longer to process at the end points because they check whether data is received in the correct order and whether retransmissions are required. This is an unnecessary overhead, because if TCP detects a transmission problem, there is no point in retransmitting. Voice is real time, so if samples do not arrive, they are considered lost and the codec software just “gets on with life” 🙂
21st July 2005 at 10:12 #29786GauravGuesthi,
I m satisfied with the answer given by froum.that is the answaer i am looking for.
Thanks a lot to everyone as i get,what i want.
1st August 2005 at 12:09 #29787Azeem s ShaikhGuestVoice-over-IP (VoIP) is based on the UDP protocol. This is because UDP has a lower overhead than TCP. What is the effective percentage gain in throughput (of any given payload) using UDP vs TCP?
2nd August 2005 at 09:06 #29788Tom HowardGuestDidn’t I just answer that one?
3rd August 2005 at 18:22 #29789rahul boseGuestVoice-over-IP (VoIP) is based on the UDP protocol. This is because UDP has a lower overhead than TCP. What is the effective percentage gain in throughput (of any given payload) using UDP vs TCP?
4th August 2005 at 09:16 #29790abaGuest7. Voice-over-IP (VoIP) is based on the UDP protocol. This is because UDP has a lower overhead than TCP. What is the effective percentage gain in throughput (of any given payload) using UDP vs TCP?
4th August 2005 at 09:23 #29791Tom HowardGuestI see. So, I wasted my time answering the latest exam question – question 7. And from the look of the confused responses, it seems that no one understood it anyway. Let’s hope none of you ever make it into the industry.
5th August 2005 at 09:54 #29792Amol from PuneGuest7. Voice-over-IP (VoIP) is based on the UDP protocol. This is because UDP has a lower overhead than TCP. What is the effective percentage gain in throughput (of any given payload) using UDP vs TCP?
immediately withing 5 minutes i want this answer
5th August 2005 at 11:37 #29793NonameGuestMy teenager daughter will not lower the volume on the stereo.
I want the VOIP comunity to give mea step by step procedure to make this trouble go away.
Right NOW!!!!!!!
I guess this question is as ridicule as some others…….
5th August 2005 at 21:03 #29794DanaGuestCan the overhead due to retransmission in TCP be quantised? i mean, is there any probability and stats.. like expected number of lost packets..
6th August 2005 at 05:34 #29795prakashGuestVoice-over-IP (VoIP) is based on the UDP protocol. This is because UDP has a lower overhead than TCP. What is the effective percentage gain in throughput (of any given payload) using UDP vs TCP?
please answer within 5 minutes
7th August 2005 at 06:46 #29796leenaGuestVoice-over-IP (VoIP) is based on the UDP protocol. This is because UDP has a lower overhead than TCP. What is the effective percentage gain in throughput (of any given payload) using UDP vs TCP?
7th August 2005 at 06:48 #29797nitaGuestVoice-over-IP (VoIP) is based on the UDP protocol. This is because UDP has a lower overhead than TCP. What is the effective percentage gain in throughput (of any given payload) using UDP vs TCP?
7th August 2005 at 06:51 #29798sagarGuesttom r u there
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