ITPEC IP October 2025 Question 32
ITPEC IP October 2025 — Question 32 of 100
A SIM is an IC card that identifies a mobile subscriber — it is inserted into a mobile phone and records information such as the subscriber identity used by the mobile network.
The network uses that identity to authenticate the subscription and associate the device with the subscriber's service. A SIM is therefore about mobile-network access, not ordinary content storage.
Answer (b)
Why not others:
- (a) describes a one-time-password security token used for authentication
- (c) describes a high-capacity memory card such as an SD card
- (d) describes a conditional-access card used to decode scrambled digital broadcasts
Key rule: A SIM identifies and authenticates a subscriber; a memory card stores user content.
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