Client Programs

• Communicate with another program
• That other program is usually on another computer
• It is termed a server

Examples of Clients

• Telnet
• FTP
• Cc:Mail
• Web browser

Examples of Servers

• Telnetd
• FTPD
• Sendmail
• Web server (httpd)
• File server (e.g. an NFS server)
• A database, e.g. Oracle

Implementation

• Clients and servers can be written in Perl (and many other languages)
• Perl has libraries that can "speak" the HTTP, FTP, and other protocols.
• You could build your own browser or FTP client in Perl if you wanted to.

Review

Name some more client and server programs.