Even though I have been a software tester for the past twenty years, I still like taking introductory courses where I can practice going back to the basics.

Right now, I am working through Mark Winteringham's Introduction to HTTP, accessible when you purchase the Ministry of Testing's Professional Membership.



The Introduction to HTTP course covers:

• What is a Web Service, as according to the World Wide Web Consortium. 
• URIs -- Uniform Resource Identifier -- with their scheme (http, https, ftp, smtp, etc), host, port, resource, and query string