1 Introduccion SO Red
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description
Documento en inglés con diapositivas que hablan sobre los sistemas operativos en red.
Transcript of 1 Introduccion SO Red
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Network Operating Systems
UT1. INTRODUCTION
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Network Operating Systems
INDEX
1. NETWORK OPERATING SYSTEMS
2. C/S ARCHITECTURE
3. NOS FEATURES
4. WINDOWS SERVER
5. FACTORS TO BE TAKEN INTO ACCOUNT WHEN
PICKING UP A NOS.
6. THE ADMINISTRATOR
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Network Operating Systems
1. NETWORK OPERATING SYSTEM
Keeps two or more computers in touch through a physical, or not, device with the objective of sharing information and system resources.
The OS can be divided in two classes:
Client/Server Architecture (C/S)
The net is controlled by the main server.
Peer-to-peer model
There is no main server.
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The main features of this kind of OS are:
They share their own resources with other machines.
They support several users at the same time.
Centralized management of resources.
Centralized management of users.
Centralized management of users privileges and permissions.
Tools for detecting network deficiencies.
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Network Operating Systems
2. C/S ARCHITECTURE (I)
A server is a computer which allows to share
its resources with other computers
connected to it.
Servers Classification:
File server: shares files in the net
Printer Server: shares printers
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Network Operating Systems
2. C/S ARCHITECTURE (II)
Servers Classification:
Mail server
Web Server
FTP Server
Communication Server: Its used to improve communications along the net.
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Network Operating Systems
2. C/S ARCHITECTURE (III)
Servers Classification:
Proxy Server: it monitors and controls the
accesses between nets.
Data base server: provides data base
services to the applications or users.
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Network Operating Systems
2. C/S ARCHITECTURE (IV)
Net layout:
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Network Operating Systems
2. C/S ARCHITECTURE (V)
Network components:
Server:
Dedicated: it manages the net.
Not dedicated: it can be used as a work station (not very advisable)
Work station:
The other computers in the net.
They access to servers and resources.
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Network Operating Systems
3. NOS FEATURES (I)
Users management
Creation, modification, erasing groups or users.
Administrar permisos de usuario
Network management
Tools for controlling the net.
Resources sharing and I/O devices.
Printer...
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Network Operating Systems
3. NOS FEATURES (II)
File management
I.e.: controls the access to the same file in order to not corrupt it.
Hard disk space:
Private: Only owner
Shared: Some users
Public: all users
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CARACTERSTICAS DIFERENCIADORAS DE LOS SISTEMAS OPERATIVOS EN RED (servidores)
Symmetrical multiprocessor
Fault tolerance mechanisms
They allow the clients to use their hardware and resources.
Client/server model
Protection of data mechanisms.
Centralized administration.
Distributed and redundant mechanisms of data storing
High performance
Monitoring tools
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Network Operating Systems
4. WINDOWS SERVER
Works on the domain model
Group of computers (servers and
clients) which share a security policy
and a common data base (Active
Directory)
Each domain must be unique.
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Network Operating Systems
4. WINDOWS SERVER
Inside a domain, there are two kinds of
servers:
Domain controller: It stores the active
directory (e.g. Users accounts)
Member server: stores files and other
resources.
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Network Operating Systems
4. WINDOWS SERVER
- Main services:
Security: Permissions, accounts...
Resource sharing
Printer services
Network services
Interoperability with other systems
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Network Operating Systems
5. FACTORS TO BE TAKEN INTO ACCOUNT WHEN
PICKING UP A NOS.
Open source or proprietary
License
Services
Scalability
Living time between versions
Reliability
Fault tolerance and protection system.
Expenses and degree of satisfaction with the
technical support.
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Network Operating Systems
5. FACTORS TO BE TAKEN INTO ACCOUNT WHEN
PICKING UP A NOS.
Hardware where it is going to be installed on.
Performance
Degree of knowledge from the technicians
in the firm.
Ease of use.
Security.
Possibilities of virtual hosting.
Centralized service management.
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Network Operating Systems
6. THE ADMINISTRATOR
He must know about: Operating systems. Networks Programming Security
Main tasks: Keep a good service (hardware and software) High security level Deal with users, problem solving... Management of users and services. Network management. Doing regular backups
Etc.
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