Unit 5 ICT - Backup Policies
Think about Who, When, Where, What, How.You should know about full backup, incremental backup, generations of backup, online backup, periodic backup.An evaluation report can be written to decide on what software to buy. Factors to be considered include:· Compatibility with existing software and hardware· Results of benchmark tests into performanceEach factor is given a weighting according to the needs of the organisation.At the start of the systems life cycle, decisions have to be made about how to acquire the software that is needed. The options are:· Software can be written by the end user · A specialist department could design, write, test and evaluate the software · External consultants could be called in to write and test the software · An off-the-shelf package could be bought · Software could be leased, with an annual fee payable for use. You need to understand the option of software emulation and the problems associated with it.
There are seven layers in the OSI model:(7) Application Layer - is used to interact with the user. Word processing and spreadsheet software has made desktop processing very popular. Advantages: Can provide local autonomy, gives the advantage of being able to share data. OSI was developed as a guide to developing standards between computers of different origins. In this layer, the user is presented with features that make the actual running of the network invisible. It deals with data transmission between computers. ISDN and broadband, that can increase the speed of data transmission. Thin Client networks are easier to administer. It deals with the routing of information around a network. 328-329) De Jure standards - these are defined by industry groups or governments. · Network Adapter - each workstation needs a network card · Cabling - to physically connect the computers · Network Operating System · Network Accounts - each user has a user ID and password to access their space on the network. An office can share disk space, software and data. Examples of common annoyances are splash screens, "beeps", "Do you really want to do this?" prompts, etc.
Common topics in this essay:
Software Evaluation,
Database DBMS,
Interaction Remember,
Peer-to-Peer Networks,
Bus Star,
Speed Transmission,
Relationships DBMS,
Distributed Databases,
TVs Internet,
Disadvantages Standards,
processing power,
de facto,
de facto standards,
database ·,
osi model,
· network,
data transmission,
disk space,
· read,
· data,
facto standards,
iso international standards,
impact system resources,
networks 10 machines,
facto standards ·,
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Acceptance Essays
