Generic selectors
Exact matches only
Search in title
Search in content
Post Type Selectors

need help about question

Viewing 15 posts - 1 through 15 (of 23 total)
  • Author
    Posts
  • #29784
    Gaurav Lohiya
    Guest

    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?

    #29785
    Tom Howard
    Guest

    UDP 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” 🙂

    #29786
    Gaurav
    Guest

    hi,

    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.

    #29787
    Azeem s Shaikh
    Guest

    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?

    #29788
    Tom Howard
    Guest

    Didn’t I just answer that one?

    #29789
    rahul bose
    Guest

    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?

    #29790
    aba
    Guest

    7. 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?

    #29791
    Tom Howard
    Guest

    I 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.

    #29792
    Amol from Pune
    Guest

    7. 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

    #29793
    Noname
    Guest

    My 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…….

    #29794
    Dana
    Guest

    Can the overhead due to retransmission in TCP be quantised? i mean, is there any probability and stats.. like expected number of lost packets..

    #29795
    prakash
    Guest

    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?

    please answer within 5 minutes

    #29796
    leena
    Guest

    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?

    #29797
    nita
    Guest

    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?

    #29798
    sagar
    Guest

    tom r u there

Viewing 15 posts - 1 through 15 (of 23 total)
  • The forum ‘Voice over IP’ is closed to new topics and replies.