Securing Data On A Network, Including The Internet
Overview
Every time data travels across a network it passes through cables, wireless signals, routers, and servers that other people could potentially intercept. The methods used to keep that data safe range from simple passwords to sophisticated encryption algorithms, and choosing the right combination depends on what you are protecting and who you are protecting it from.
In this lesson you will explore seven layers of network security: authentication, firewalls, encryption (including WEP, WPA, and public key cryptography), VPNs, file access rights, transaction logs, and backup strategies. You will learn how to match each method to a real scenario, a skill that Edexcel tests in both Paper 1 and Paper 2.
Objectives
- Know about and understand the use of log-ins and passwords, firewalls, WEP/WPA, encryption, VPN, file access rights, transaction logs and backups
- Be able to select suitable methods of securing data for a particular context
Lesson Note
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Lesson Evaluation
Congratulations on completing the lesson on Securing Data On A Network, Including The Internet. Now that youve explored the key concepts and ideas, its time to put your knowledge to the test. This section offers a variety of practice questions designed to reinforce your understanding and help you gauge your grasp of the material.
You will encounter a mix of question types, including multiple-choice questions, short answer questions, and essay questions. Each question is thoughtfully crafted to assess different aspects of your knowledge and critical thinking skills.
Use this evaluation section as an opportunity to reinforce your understanding of the topic and to identify any areas where you may need additional study. Don't be discouraged by any challenges you encounter; instead, view them as opportunities for growth and improvement.
- Which wireless encryption protocol assigns a unique key to each device on the network? A) WEP B) WPA C) VPN D) Caesar cipher Answer: B
- What is the main purpose of a firewall? A) To encrypt data before it is sent B) To back up data automatically C) To inspect and filter data packets entering or leaving a network D) To assign usernames and passwords to users Answer: C
- In public key encryption, which key is used to decrypt a message? A) The sender's public key B) The recipient's public key C) The sender's private key D) The recipient's private key Answer: D
- Which type of backup copies only files that have changed since the last backup of any type? A) Full B) Differential C) Incremental D) Mirror Answer: C
- A company wants employees to access the office network securely from home. Which technology should they use? A) WEP B) Firewall C) VPN D) Transaction log Answer: C
Available on the Green Bridge App
Download the Green Bridge CBT app on your phone or computer to access full lesson notes, practice questions, and more.
Available on the Green Bridge App
Download the Green Bridge CBT app on your phone or computer to access full lesson notes, practice questions, and more.
Recommended Books
Practice Mock Questions
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