compiled by Husen Adem at Ambo University || Woliso Campus department of Information Technology

1. Ambo University
Woliso Campus
Department of Information Technology
Network and System Administration
Chapter One
Computer System And network Overview
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2. The topics discussed in this section include
 Introduction to networks.
 Need for networks.
 Definition of Network and System administration
 network and system administration tasks
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3. WHAT’S A NETWORK?
 A network defined as ‘an interconnected collection of autonomous
computers’.
o AUTONOMOUS: in this context no computer on a network can start, stop or
control another.
o INTERCONNECTED : Two or more computers are interconnected if they can
exchange information.
 A network may be composed of any combination of LANs, or WANs.
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4. Cont..
 The network becomes a powerful tool when computers communicate and
share resources with other computers on the network.
 Computers on a network can act as a client or a server.
o A client is a computer that requests for resources.
o A server is a computer that controls and provides access to resources.
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5. NEED FOR NETWORKING
 Resource Sharing: to make all resource available to anyone or everyone
connected
 Reliability: The idea is –if one crashes other can carry on. on.
e.g. if one file is deleted from a system it’s safely stored on an another on
the network.
 Cost Factor:
 Communication Medium: changes at one end can suddenly be sent to the
other and It brings faster and better co-operation.
 Facilitate centralized management
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6. Network and System administration
What is system :
what is network:
What is administration:
 A system is :
o a collection of elements/components that are organized for a common purpose.
o could be a mechanical device, a computer, an office of workers a network
of humans and machines.
 Administration: - it’s supervising the way that an organization or institution
 It include all of the organizational aspects and also engineering issues, such
as system fault diagnosis.
 It is like the medical profession, which combines checking, management and
repair of bodily functions.
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7. Cont..
 The term network and system administration is :
o concerns about the operational management of human computer system.
 Keeping the systems up in a consistent state
 Monitor performance
 Babysit users, make changes on their behalf
 Install, configure, upgrade, maintain
 Backup, restore, disaster recovery.
In order to handle /achieve the goal it requires
Procedure
Team work
Ethical practice
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8. The human role in systems
 The task of system administrator is a balancing act, it requires
patience, understanding, knowledge and experience.
 Computing systems require the very best of organizational skills
and the most professional of attitudes.
 We need to work with the limited resource we have, be inventive
in a crisis, and know a lot of general facts and figures about the
way computers work
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9. Who is a System Administrator?9
Someone who takes care of the systems others are using.
System Running
Smoothly and Efficiently
Users able to work in
Easy and Efficient Manner
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10. Network and System Administration Tasks
Here are some of system and network administration tasks:-
 User Management-create/revoke user, Cota mgt, Role
 Software and Hardware Management: safety
 System Monitoring & Troubleshooting
 Documentation
 Backups
 Automation, Planning, Policies, and Auditing
 Designing and planning the network
 Maintaining the network
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11. Challenges of System Administration
System admin Not just installing system/software, also about planning and
designing an efficient community of computers.
Design a logical and efficient network.
Decide what and where services are installed.
Plan and implement security.
Provide a comfortable environment for users.
Develop ways of fixing problems and errors.
:- so that the real users will able to get quality of services.
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12. Thank you!
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