1. 3.1
Types of
Servers

3. What You Need To Know
application
database
hypervisor

5. File/print
Application
Database
Web
Mail
Hypervisor

6. Hardware also runs special server software to manage services

7. LAN Example
Client Devices
WAP
Switch
Server

8. Web Server
Database Server
Logon Server
File Server
Print Server

9. Local Area Network Wide Area Network (eg the Internet) Server Farm
Mail Server
Firewall
Web Server
Client Devices

11. Server-based processing is…
‘Remote’
Data Centre
Client

12. Server-based processing is…
Secure
Data Centre
Client

13. Server-based processing is…
Reliable
Backups
Updates
Data Centre
Client

14. Server-based processing is…
‘Scalable’
Data Centre
Server
Client

15. Server-based processing is…
General Advantages
Server-based processing is…
‘Remote’
Processing done on different site
Secure
Only authorised access
Backups
Reliable
Updates
‘Scalable’
Expand with demand

16. File/print
Application
Database
Web
Mail
Hypervisor

17. Stores large number of files for an organisation
File Server
Stores large number of files for an organisation
Also controls security, such as access rights to files
Finally, handles backups in case of accident or disaster

18. Manages queue of docs for printing
Print Server
Manages queue of docs for printing
So shares load of print requests across available devices
Controls access to printers for users & routes docs to devices

19. Installs, updates & controls access to programs
Application Server
Installs, updates & controls access to programs
Includes basic applications such as word processor or
But also specialised software, such as for financial staff only

20. Manages security & updates to large databases
Database Server
Manages security & updates to large databases
For example in a school, security means controlling access to staff
So teachers update registers & office staff update financial data

21. Web Server

22. Stores all files for a website
Web Server
Stores all files for a website
Sends them when user’s browser sends a request for the website
Web server then sends the site’s files using the HTTP protocol

23. Stores & forwards emails like an electronic post office
Mail Server
Stores & forwards s like an electronic post office
Data traffic controlled by protocols, eg SMTP (send) & POP (receive)
But traffic is not immediate like instant messaging or ‘chat’

24. Software that allows a host machine to run guest machines
Hypervisor Server
Software that allows a host machine to run guest machines
Acts like a ‘supervisor’ that shares resources between the guest machines eg different OS