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For 2021 - online Python 3 training - see ((here)).

Our plans were to retire in summer 2020 and see the world, but Coronavirus has lead us into a lot of lockdown programming in Python 3 and PHP 7.
We can now offer tailored online training - small groups, real tutors - works really well for groups of 4 to 14 delegates. Anywhere in the world; course language English.

Please ask about private 'maintenance' training for Python 2, Tcl, Perl, PHP, Lua, etc.
A bolt of lightning on Multicasting

When I learnt about TCP/IP, Multicasting was a bit of a footnote in the appendix. I can appreciate that for broadcast / streaming applications it could have its use but ... in my day-to-day stuff I didn't expect to see it used "in anger". Then today I was watching a customer rebuilding 26 machines in parallel from a central server - a classroom application - using multicast. Data transfer rate was an impressive ... one of those DUH - of COURSE moments.

(written 2004-08-11, updated 2011-12-31)

 
Associated topics are indexed as below, or enter http://melksh.am/nnnn for individual articles
A163 - Web Application Deployment - Network Configuration and Security
  [37] Security and Safety - (2004-09-03)
  [267] Searching security holes - (2005-04-04)
  [332] Looking up IP addresses - (2005-06-01)
  [506] What are DHCP and DNS? - (2005-11-27)
  [511] Domain Forwarding - 2 ways of doing it - (2005-11-29)
  [1073] Heartbeat script in Perl - (2007-02-09)
  [1408] Wireless hotel tips - FTP and Skype connections failing - (2007-10-26)
  [1666] Slow boot and terminal start on Linux boxes - (2008-06-05)
  [1712] As different as night and tyres - (2008-07-18)
  [1904] Ruby, Perl, Linux, MySQL - some training notes - (2008-11-23)
  [2052] How was my web site compromised? - (2009-02-24)
  [2489] Parallel Pinging, using Python Threads or Expect spawn lists - (2009-11-02)
  [3448] Checking all the systems on a subnet, using Expect and Tk - (2011-09-18)
  [4134] Setting up your MacBook Air as a mobile broadband router - (2013-07-07)


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This is a page archived from The Horse's Mouth at http://www.wellho.net/horse/ - the diary and writings of Graham Ellis. Every attempt was made to provide current information at the time the page was written, but things do move forward in our business - new software releases, price changes, new techniques. Please check back via our main site for current courses, prices, versions, etc - any mention of a price in "The Horse's Mouth" cannot be taken as an offer to supply at that price.

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