ITPEC IP April 2026 Question 40
When a PC is connected directly to the Internet during a business trip, which of the following is appropriate to use in order to prevent unauthorized access from the Internet?
Explanation
Personal firewall — software on the PC itself that filters communication with the Internet and blocks unauthorised access.
At the office the company firewall stands between the PC and the Internet. Connected directly to the Internet on a trip, the PC has no such protection, so it needs its own: a personal firewall checks incoming and outgoing communication against rules, lets permitted traffic through and blocks access from outside that was not asked for.
Answer (b)
Why not others:
- •(a) IC card authentication — confirms who is using the PC when logging on; it does nothing about access arriving over the network
- •(c) Hard disk password — stops the disk being read if the PC is stolen or the disk removed; it does not act on network traffic
- •(d) File encryption software — keeps files unreadable if they leak; it does not stop the access itself
Key rule: Match the control to the route of the threat: access over a network is stopped by a firewall; theft of the device or the files is limited by passwords and encryption.
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