Computer and Networking Speeds


Theoretical speeds

802.11b – 11 Mbps (2.4GHz)
802.11a – 54 Mbps (5 GHz)
802.11g – 54 Mbps (2.4GHz)
802.11n – 600 Mbps (2.4GHz and 5 GHz) – 150Mbps typical for network adapters, 300Mbps, 450Mbps, and 600Mbps speeds when bonding channels with some routers
802.11ac – 1300+Mbps (5 GHz) – newer standard that uses wider channels, QAM and spatial streams for higher throughput

Actual Average Speeds

Below is a breakdown of actual real-life average speeds you can expect from wireless routers within a reasonable distance, with low interference and small number of simultaneous clients:

802.11b – 2-3 Mbps downstream, up to 5-6 Mbps with some vendor-specific extensions.
802.11g – ~20 Mbps downstream
802.11n – 40-50 Mbps typical, varying greatly depending on configuration, whether it is mixed or N-only network, the number of bonded channels, etc. Specifying a channel, and using 40MHz channels can help achieve 70-80Mbps with some newer routers. Up to 100 Mbps achievable with more expensive commercial equipment with 8×8 arrays, gigabit ports, etc.
802.11ac – 70-100+ Mbps typical, higher speeds possible over short distances without many obstacles, with newer generation 802.11ac routers, and client adapters capable of multiple streams. Continue reading Computer and Networking Speeds

Yard Remodel

  • Preparation
  • Divider
    • Use 4×4 posts as divider with neighbor
    • Use 3 stakes per 4′ of divider (2 on ends on neighbor side, one in middle on my side)
  • Perimeter
    • Dig up using drill dirt along the perimeter
    • Lay 2″x3″ wood leaving 3″ above wood to driveway surface
  • Edging
    • Use edging to create areas for sand, rubber mulch, and river rocks

Continue reading Yard Remodel

HD Screen and Audio Recording on a Mac (+ Basic Editing)

  1. Do all of this on a Mac with 1920 x 1080 (HD) resolution
  2. Install SoundFlower for Mac
    This is necessary because QuickTime doesn’t let you record system audio
  3. Play an audio file (e.g. mp3)
  4. Play a video (e.g. from YouTube)
    If you want the video to be full screen, make it so from the application, e.g. YouTube. To remove the window chrome, click Command + Shift + F to maximize.
  5. Open QuickTime Player (included with Mac) and choose “New Screen Recording”
  6. Next to the record button, click the drop-down and choose Sound Flower 2ch
  7. Record the video and / or audio
  8. In QuickTime Player, trim both ends of the video to your liking
  9. In QuickTime Player, insert other video clips wherever you want on the timeline
  10. The recorded video will be a huge mov file (large file size). Upload it to YouTube and then download the MP4 from YouTube to compress it.

How to Stop a Chronic Cough, Mucus, and Tickle in Throat

Most people would say that if you have a chronic cough, it’s probably due to allergies. Actually, the two most probable causes of a chronic cough are

  • allergies
  • acid reflux

I had a chronic cough for many, many years along with an irritating tickle in the back of my throat. I would also have to constantly clear my throat of mucus. I saw many doctors and an allergist and they all told me it was due to allergies and that I had post-nasal drip. I tried many types of pills and inhalers and even a nasal flush but none of them permanently got rid of my chronic cough. After doing some research on my own, I found that acid reflux is often a cause of

  • coughing
  • mucus
  • tickle in back of throat

Continue reading How to Stop a Chronic Cough, Mucus, and Tickle in Throat