Re: CSMA/CA

Discussion in 'Wireless Networking' started by Axel Hammerschmidt, Jan 10, 2007.

  1. Jason <> wrote:

    > I understand that this is the access method used by wireless networks. I
    > also understand that devices send an alert messages (RTS) before sending a
    > packet. Here's my question: Is this alert message sent FOR EVERY packet?


    No. But you can set the RTS/CTS threshold to a value below 2346 so that
    it is.

    > If so, what is the size of a wireless data packet?


    The size of the packet is 34 (the frame) + anything from 0 to 2312(the
    body) bytes.

    > If not, does the alert message approximate a time when the transmissions
    > will cease and the line will be free?


    Yes. With the Network Allocation Vectot (NAV). 802.11 uses two types of
    carrier sensing functions, a physical and a virtual (the NAV).
    Axel Hammerschmidt, Jan 10, 2007
    #1
    1. Advertising

Want to reply to this thread or ask your own question?

It takes just 2 minutes to sign up (and it's free!). Just click the sign up button to choose a username and then you can ask your own questions on the forum.
Similar Threads
  1. Replies:
    1
    Views:
    592
    Vincent C Jones
    Apr 5, 2005
  2. How To Analyze CSMA/CD

    , Apr 5, 2006, in forum: Cisco
    Replies:
    0
    Views:
    402
  3. How To Analyze CSMA/CD

    , Apr 5, 2006, in forum: Cisco
    Replies:
    1
    Views:
    1,585
Loading...

Share This Page