Clientserver computing

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Client-server computing
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Topics

• Client-server computing mechanism
• Client applications
• SSH
• FTP
• AFS

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Before we start Create your folder for this
class under temp on D drive in the following
fashion inls050_YourFirstName_YourLastName For
example inls050_lili_luo
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Concepts of client-server computing

• Server
• a program that provide services to other
  machines
• Client
• a program that request and receive services from
  servers

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A server machine may provide one or more services
on the Internet. For example, a server machine
might have software running on it that allows it
to act as a Web server, an e-mail server and an
FTP server, etc isis.unc.edu email server,
file server, application server, ftp server, web
server
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Clients that come to a server machine do so with
a specific intent, so clients direct their
requests to a specific software server running on
the overall server machine. For example, if you
are running a Web browser on your machine, it
will most likely want to talk to the Web server
on the server machine.
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A blurry line Its common and possible for a
machine to be both a server and a client
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What a server machine looks like?
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Lets go back to class notes to learn more about
client applications