ITPEC IP April 2018 Question 31

Using a smartphone as a mobile router to connect a PC to the Internet — that is tethering.

With tethering, a smartphone or similar terminal shares its mobile data connection. The PC connects to the smartphone over Wi-Fi, USB or Bluetooth, and the smartphone relays the PC's traffic over the mobile network to the Internet.

Answer (b)

Why not others:

• •(a) — malware that copies itself and spreads across a network is a worm
• •(c) — detecting tampering with a hash and public key cryptography describes a digital signature
• •(d) — entering SQL commands in a web input field to manipulate the database is SQL injection

Key rule: Tethering shares one device's Internet connection with other devices nearby.

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