Information and Communication Technology - 4IT1 PearsonEdexcel

Securing Data On A Network, Including The Internet

Muhtasari

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.

Malengo

  1. Know about and understand the use of log-ins and passwords, firewalls, WEP/WPA, encryption, VPN, file access rights, transaction logs and backups
  2. Be able to select suitable methods of securing data for a particular context

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Maelezo ya Somo

A school network might hold exam results, medical records, and staff payroll data. A hospital network carries patient histories. An online retailer handles thousands of credit card numbers every hour. In every case, the consequences of a breach are serious: identity theft, financial loss, legal penalties, and damaged trust. Security is not an optional extra; it is a requirement that shapes how every network is designed and managed.

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Tathmini ya Somo

Hongera kwa kukamilisha somo la Securing Data On A Network, Including The Internet. Sasa kwa kuwa umechunguza dhana na mawazo muhimu, ni wakati wa kuweka ujuzi wako kwa mtihani. Sehemu hii inatoa mazoezi mbalimbali maswali yaliyoundwa ili kuimarisha uelewaji wako na kukusaidia kupima ufahamu wako wa nyenzo.

Utakutana na mchanganyiko wa aina mbalimbali za maswali, ikiwemo maswali ya kuchagua jibu sahihi, maswali ya majibu mafupi, na maswali ya insha. Kila swali limebuniwa kwa umakini ili kupima vipengele tofauti vya maarifa yako na ujuzi wa kufikiri kwa makini.

Tumia sehemu hii ya tathmini kama fursa ya kuimarisha uelewa wako wa mada na kubaini maeneo yoyote ambapo unaweza kuhitaji kusoma zaidi. Usikatishwe tamaa na changamoto zozote utakazokutana nazo; badala yake, zitazame kama fursa za kukua na kuboresha.

  1. 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
  2. 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
  3. 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
  4. 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
  5. 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

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Vitabu Vinavyopendekezwa

Pearson Edexcel International GCSE (9-1) ICT Student Book
Pearson Edexcel International GCSE (9-1) ICT Student Book
Manukuu: First edition
Mchapishaji: Pearson Education
Mwaka: 2017
ISBN: 978-0-435-18866-9
Maelezo: Endorsed student book covering the full 4IT1 specification.

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