The document introduces servers and defines a server as a computer program that performs computational tasks on behalf of client programs. It describes different types of servers including web servers, proxy servers, FTP servers, mail servers, DNS servers, and DHCP servers. It provides examples of how each type of server functions in a client-server network to provide services to client computers.

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INTRODUCTION TO SERVER
By Zhamanov Azamat

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Question
• What is the Server?

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Thinking

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Thinking

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Thinking

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Thinking

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Answer
• Server is a computer program running to serve the
requests of other programs, the "clients". Thus, the
"server" performs some computational task on behalf of
"clients".

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Client/Server
Clients consume
services and resources
from Server
Client
Client
Server provides
Service for clients
Client
Client

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What is Server Platform?
• A term often used synonymously with operating system. A
platform is the underlying hardware or software for a
system and is thus the engine that drives the server.

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Type of Servers
• Proxy Servers
• Web Servers
• Application Servers
• FTP Servers
• Mail (Exchange) Servers
• DNS Server
• DHCP Server

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Proxy Server
Internet
Proxy Server
Client Client Client

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Web Server
Web Server
Internet
Client
Web Pages & Graphics

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Web Server
Web Server Application Server
Internet
Client Web Pages & Graphics Template pages, Code & Data

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FTP Server
FTP Server
Internet
Client Files

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Mail Server
gmail.com (MTA) mail.ru (MDA)
SMTP SMTP
Internet
POP
SMTP
Internet Internet
POP
SMTP
Sender (MUA) Receiver (MUA)

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Mail Server
gmail.com (MDA) mail.ru (MTA)
SMTP SMTP
Internet
POP SMTP
Internet Internet
POP SMTP
Receiver (MUA) Sender (MUA)

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DNS Server
DNS Server
Internet
DNS Client
DNS Table (IP+Domain)

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DHCP Server
DHCP Server
DHCP Client
IP address Pool