ITPEC IP October 2025 Question 88

Monitoring at a theft prevention gate in a library — the gate reads the IC tag in each book by radio.

An IC tag (RFID tag) is a small chip with an antenna that stores an ID and is read without contact by radio waves. A library attaches one to each book; the gate at the exit reads any tag passing through and raises an alarm if the book has not been checked out. No line of sight is needed, so books in a bag are detected too.

Answer (d)

Why not others:

• •(a) — a bar code is printed and read optically by a scanner, not a chip read by radio
• •(b) — a remote medical system sends images over a communication network; no tag identifies anything
• •(c) — a car navigation system finds its position from GPS satellite signals and map data

Key rule: An IC tag is identification by radio: it can be read without contact, through packaging and several at a time, which bar codes cannot do.

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