Client – Server model “Server” – because it provides a service. “Client” – because they take advantage of the service.
Hyper-Text Transfer Protocol (HTTP) HTTP protocol shared between two applications.
Uniform Resource Locator Describes –The protocol used. –Type of service requested. –The domain name (IP address). –Location (on the host) of the document. –Name of the document (message). http://www.hct.ac.ae/courses/higherdiploma.html http://webmail.hct.ac.ae/index.html ftp://ftpservername.hct.ac.ae/myfiles/plan.doc
Services (and their provider) Web content (web Server) File transfer (ftp Server) Chat (irc Server) Email (smtp and pop server) Applications (database servers)