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Chapter 13 - Coggle Diagram
Chapter 13
chapter 7
No matter how many users LANs serve, they
are all designed to share resources such as internet connections, printers or server connections
ADVANTAGES OF LAN
Software (and licenses), files and hardware can be shared easily with the devices
connected to the network
A wireless local area network (WLAN) is the same as a LAN but it
has the ability to connect wireless devices such as smartphones, laptops and tablets to the LAN.
Files and other data can be shared faster if they remain on the network and do not
need to be uploaded to the internet or emailed.
A local area network (LAN) is a small network of computers covering a small area, such as an
office building or school.
Networks can be centrally controlled, making it easier to make changes, monitor users,
update software, troubleshoot hardware and software issues and maintain resources.
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DISADVANTAGES OF LAN
The initial setup costs for creating a network can be high, especially in a school or
office environment
There is a risk of privacy and data violations. Network administrators may have
access to all the files created by each user
If a network is not secured properly, one infected computer can infect the entire network.
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EVALUTE INFORMATION
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was not created by someone with knowledge in the field, then the information they are
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from one source against the information from a few others. If the facts match, you can
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be more accurate. A technology blog from 2010 will be less relevant, and therefore
less accurate, to your research than one from 2017. Information from the last ten years
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EVALUATE WEBSITE
Not all websites are created equal and many may contain misleading, or even false,
information. Much as you evaluate the quality of the information you receive, you must also
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Closed-ended questions have a limited set of possible answers, such as “yes”, “no” or “A”,
while open-ended questions need more complex answers.
DEFINING THE TASK
To understand what is expected of you, you must do the following:
- Read the instructions. Does the task call for a report? How will you gather the information?
- Rewrite the question in your own words. Get to the core of the question. Rewriting helps
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- Identify the key terms. Look for verbs or subject-specific terms in the task (verbs like
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Intranet vs internet
An intranet is a private, web-based network that is only available to an organisation’s staff.
The internet is a massive network of networks with millions of computers
connected to each other across the globe.
BASIC
NETWORK
SECURITY*
Passwords are the most basic form of network security. Passwords, at their core, are a
secret string of letters, numbers and symbols created by users or generated by a computer
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A user with administrative rights can
access all the files and folders on a computer and can make changes that will affect all users.
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Examples of spreadsheet software include Microsoft Excel, Google Sheets, LibreOffice Calc and iWork Numbers
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Spreadsheets can also be used as a modelling tool, that you can use them to predict trends.
Database can do exactly what a spreadsheet can but with more data since spreadsheets are limited in the amount data they can hold. Databases are also usually kept on a server so they can use the bigger processing power of the server.
Databases can also better analyse and connect data than spreadsheets, which makes it easier for users to search for and extract the information from the data
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Manipulating data is the process of sorting, arranging or moving the data without changing it. To manipulate data you need to know: The features of the programs you are using and how to use them; Make sure the data is in the correct format for what you need to do; and The tools you can use include sorting, formulae and functions and queries.
EXTRACTING APPROPRIATE INFORMATION
Within spreadsheets and databases, there are various tools and commands you can use to extract information, for example, for a big data set, you can use VLOOKUP in Excel.
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ADDIND DATA QUESTIONSOnce you have verified your data, you can begin to apply the data questions such as;
- How many?
- What is most popular?
- What is least common?
- How many more than?
- What is the average?
TRENDS AND PATTERNS
The final step in data analysis is to look for trends and patterns.
Trends are the general tendecy of data to move in one direction over time
Another type of trend is downward trend. This happens when the data points move down.
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