All of the Following Are Used for Authentication Except

question 47

Multiple Choice

All of the following are used for authentication except:

• A) digital signatures.
• B) certificates of authority.
• C) biometric devices.
• D) packet filters.

---

Definitions:

Ice-Age Glaciers

Massive sheets of ice and snow that covered large parts of the Earth’s surface during the last glacial period, significantly altering the planet's surface and ecosystem.

Rain Shadow

A relatively dry region on the downwind side of a topographic obstacle, usually a mountain range; rainfall is noticeably less than on the windward side.

Upwelling Ocean Currents

Upwelling ocean currents are oceanic currents that bring deep, cold, and nutrient-rich water to the surface, fueling primary productivity and supporting marine ecosystems.

Atmosphere Circulation

The large-scale movement of air through the Earth's atmosphere, distributing heat and moisture around the planet and influencing climate and weather patterns.