1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

Latency?

Discussion in 'Internet, Connectivity and Communications' started by Boycie, Oct 14, 2006.

  1. Boycie
    Honorary Member

    Boycie Senior Beer Tester

    6,281
    85
    174
    I was amazed to see the difference in an ADSL speed test result when using a wired vs wireless connection.

    Si
     
    Certifications: MCSA 2003, MCDST, A+, N+, CTT+, MCT
  2. Baba O'Riley

    Baba O'Riley Gigabyte Poster

    1,760
    23
    99
    Um, thanks for that!

    If you fiddle around with different types of encryption, you find it improving. My wireless connection is quite a bit faster if I use AES rather than TKIP.
     
    Certifications: A+, Network+
    WIP: 70-270
  3. r.h.lee

    r.h.lee Gigabyte Poster

    1,011
    52
    105
    Boyce,

    That's because Category 3 UTP cabling is rated to go 10 Mbps and Category 5 UTP cabling is rated to go 100 Mbps. Wireless 802.11g is rated to go 54 Mbps but that's shared among the wireless nodes, as if they were connecting to a "wireless hub." Then given ambient electromagnetic interference from devices in your own home, like the cordless phone working at the same frequency as the WAP/Wireless Router and electromagnetic interference from your neighbors will also have a direct impact on wireless latency.

    *waves his flag woven with UTP cabling* :)
     
    Certifications: MCSE, MCP+I, MCP, CCNA, A+
    WIP: CCDA
  4. Bluerinse
    Honorary Member

    Bluerinse Exabyte Poster

    8,871
    167
    256
    What did you observe Simon?
     
    Certifications: C&G Electronics - MCSA (W2K) MCSE (W2K)
  5. Boycie
    Honorary Member

    Boycie Senior Beer Tester

    6,281
    85
    174
    Baba- Not a problem mate :biggrin
    I see what you mean about encryption :thumbleft

    Rhlee- Yes, but even the slowest link (54Mbps) is still far greater than the WAN speed.

    Pete- If testing wirelessly i have a download speed reported of 1.4mbps, compared to 5.7Mbps using a cat5 wire. There is also a WAN status page within my Zyxel gateway that shows a download speed of 5.7Mbps.
    I know that the <wired> report is correct, just nosing.....

    Si
     
    Certifications: MCSA 2003, MCDST, A+, N+, CTT+, MCT
  6. hbroomhall

    hbroomhall Petabyte Poster Gold Member

    6,623
    115
    224
    In addition, don't forget that WiFi is half-duplex, whereas most decent Ethernet kit these days is full-duplex.

    Add in the fact that WiFi has a huge overhead on the packets, so that the best you can hope for in throughput is about half the stated rate.

    Harry.
     
    Certifications: ECDL A+ Network+ i-Net+
    WIP: Server+
  7. Boycie
    Honorary Member

    Boycie Senior Beer Tester

    6,281
    85
    174
    Harry,

    Thanks for the explanation.

    Si
     
    Certifications: MCSA 2003, MCDST, A+, N+, CTT+, MCT
  8. Bluerinse
    Honorary Member

    Bluerinse Exabyte Poster

    8,871
    167
    256
    Wow that is quite a difference even when taking into account packet size, half duplex and encryption. Still either beats my 53KB/s into a cocked hat :oops:
     
    Certifications: C&G Electronics - MCSA (W2K) MCSE (W2K)
  9. Baba O'Riley

    Baba O'Riley Gigabyte Poster

    1,760
    23
    99
    I would investigate this a bit further if I were you Boyce, on my Wi-Fi set up, downloading a file will get me about 1.5 mbps but I'm only on a 2mbs connection. Proportionately, thats way faster that yours. What wireless standard and encryption are you using?
     
    Certifications: A+, Network+
    WIP: 70-270
  10. Boycie
    Honorary Member

    Boycie Senior Beer Tester

    6,281
    85
    174
    Baba,

    Centrino based laptop. Zyxel 660HW wireless router. WPA TKIP....

    I will <mess around> with encryption and report back.

    Si
     
    Certifications: MCSA 2003, MCDST, A+, N+, CTT+, MCT

Share This Page

Loading...