A smart-home hub encrypts all sensor readings. A nearby observer cannot read the messages but infers when residents return home by studying packet timing and volume, without altering traffic. Which attack best describes this behavior?

An attacker remotely coordinates 5,000 infected smart cameras to flood a city’s smart-parking server with traffic. What is the collective group of infected cameras called?

Match each integrity requirement for IoT telemetry to the most precise X.800 data-integrity service.

A worm compromises one building-control gateway. Rather than sweep the local subnet or choose random addresses, it reads that gateway’s stored list of trusted peer gateways and uses those relationships to discover its next targets. Which scanning strategy is being used?

A smart water meter correctly records 12 m³ of consumption, but an attacker changes the value to 120 m³ while it travels to the utility server. Which security objective is most directly violated?

Investigators find malware on an IoT gateway that rewrites its entire program body during successive infections. The copies may change both appearance and behavior, making straightforward signature matching unreliable. Which classification is most precise?

The owner of a smart fitness watch wants control over which personal measurements are collected, stored, and shared with third parties. Which concept most directly addresses this concern?

For a smart-meter incident, 100 meters are at risk, each representing 120 JOD of asset value. The exposure factor is 25%, and the estimated annual rate of occurrence is 3. What is the annualized loss expectancy (ALE)?

Match each design decision for a connected-device platform to the security design principle most specifically illustrated.

Match each protective technique used in an IoT deployment to the X.800 security mechanism it illustrates.