Lesson Plan
Security measures
Teacher’s Notes
Length 60 mins Specifi cation Link 216/g
Learning objective
Candidates should be able to:
(g) explain the need for security measures in networks, such as user access levels, suitable
passwords and encryption techniques
Time (min) Activity Further Notes
10 Explain to the students that they will be looking at
strategies for enhancing network security.
• Ask the students to list any security measures that
they are aware of.
Using a projector, display the interactive Starter
Activity which includes information on basic
networksecurity.
Measures such as login names and
passwords, can allow access-only to fi les
from certain folders e.g. accessing work
set by teachers but not being able to
upload or write to those folders.
10 Watch the video pausing to discuss the content.
5 Discuss the video to assess learning. Ask questions
such as:
• Why is network security needed?
• What are user access levels?
• What are the rules for creating a strong password?
• What is meant by encryption?
• How is data encrypted using public and private keys?
Answers:
To prevent unauthorised access and the
loss or corruption of data.
The different access levels for folders and
fi les that are given to network users e.g.
they may not be able to see certain folders
and may not be able to write to or delete
certain fi les.
Passwords should be at least 8 characters
long.
They should contain both numbers and
letters.
They should contain both upper and lower
case letters.
They should contain at least one character
such as: !, $, ? etc.
Encryption is the scrambling of data into
a form that cannot be understood by
unauthorised recipients.
The encrypted data must be decrypted
back to its original form.
If person A wanted to send an encrypted
fi le to person B, person A would encrypt it
with person B’s public key.
On receipt, person B would then decrypt
the fi le with their private key.
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