Survey Scan headings

Discussion in 'HyperWRT Firmware' started by telemarkkid, Mar 8, 2006.

  1. telemarkkid

    telemarkkid Network Guru Member

    Can someone explain what the different headings are on the site survey for tofu 13c? I know what the SSID is and the BSSID looks like the MAC address, but is RSSI? Is it signal strenght? How about the capabilities section, I see infra shortpre shortslot, and infra shortslot. What is the difference between the rates in green and blue? Anything to say if the network is secure or not? For the noise column, the smaller the number the better(ignoring the negative sign), right?

    There are a ton of questions, thanks for helping me out.
  2. telemarkkid

    telemarkkid Network Guru Member

    I still can't figure out the difference between the transmission rates in blue and green and a method of determining if a connection is secure.

    After doing some digging, I have answered the RSSI question, yes it is the signal strenght. shortslot is short slot time below I got this info cisco's site

    You can increase throughput on the 802.11g radio by enabling short slot time. Reducing the slot time from the standard 20 microseconds to the 9-microsecond short slot time decreases the overall backoff time, which increases throughput. Backoff time, which is a multiple of the slot time, is the random length of time that a station waits before sending a packet on the LAN.

    When you enable short slot time, the access point/bridge uses the short slot time only when all clients associated to the 802.11g radio support short slot time. Short slot time is disabled by defaul

    SHORTPRE: is short preamble
    The radio preamble (sometimes called a header) is a section of data at the head of a packet that contains information that the access point and client devices need when sending and receiving packets. You can set the radio preamble to long or short:

    •Short—A short preamble improves throughput performance. Cisco Aironet Wireless LAN Client Adapters support short preambles. Early models of Cisco Aironet's Wireless LAN Adapter (PC4800 and PC4800A) require long preambles.
  3. mstombs

    mstombs Network Guru Member

    Thibor has answered this before, different colours are used to display different available rates there is no extra info presented.

    You should use Netstumbler from a wireless client if you want to find out more about the connections such as security.
  4. telemarkkid

    telemarkkid Network Guru Member

    Netstumbler doesn't work if a actuall wireless card isn't installed, correct? I'm running in client mode.
  5. mstombs

    mstombs Network Guru Member

    Yes I mean you use the wireless adaptor card in a wireless client, I find the built in one in my dell laptop to be much more sensitive than my wrt54GS, and Netstumbler more informative. The Hyperwrt site survey function is great when using a wired client and setting up the router.
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