How internet works

Front

How do devices connect to the Internet?

Back

Through routers using Wi-Fi or Ethernet

Answer explanation

Answer: b) Through routers using Wi-Fi or Ethernet

(c) alone doesn’t provide Internet access without a gateway.

Front

What is the Internet?

Back

A global network of communicating computers

Answer explanation

b) A global network of communicating computers

Options a, c, and d misrepresent its decentralized nature.

Front

What is the role of an ISP?

Back

To assign unique IP addresses for communication

Answer explanation

Answer: b) To assign unique IP addresses for communication

While ISPs provide access (implied), their core role here is addressing, not hardware repairs (d) or website development (c).

Front

How is most international internet traffic transmitted? Options: Through satellites, Via giant fiber-optic cables on the ocean floor, Using radio waves, Through underground copper wires

Back

Via giant fiber-optic cables on the ocean floor

Answer explanation

Answer: b) Via giant fiber-optic cables on the ocean floor

Underwater fiber-optic cables as the primary medium for cross-continental traffic, not satellites (a) or copper wires (d).

Front

What are data packets?

Back

Small chunks of data broken down for transmission

Answer explanation

Answer: b) Small chunks of data broken down for transmission

Packetization for efficient transfer. "Large files sent whole" (a) contradicts this design.

Front

Why does the Internet use packet switching?

Back

For efficient and fault-tolerant communication

Answer explanation

Answer: b) For efficient and fault-tolerant communication

Packets take different paths, ensuring reliability if one fails. Slowing data (a) or increasing costs (c) are incorrect.

Front

What happens if a router fails on the Internet?

Back

Data is rerouted through other paths

Answer explanation

Answer: b) Data is rerouted through other paths

Internet’s fault tolerance via rerouting. A single router failure doesn’t shut down the entire network (a).

Front

What does DNS stand for?

Back

Domain Name System

Answer explanation

Answer: a) Domain Name System

options are fabricated acronyms.

Front

What is the function of DNS?

Back

To translate website names to IP addresses

Answer explanation

Answer: b) To translate website names to IP addresses

DNS converts human-readable names (e.g., google.com) to machine-readable IPs. It doesn’t assign IPs randomly (a).

Front

What is an IP address?

Back

A unique identifier for devices on the Internet

Answer explanation

Answer: b) A unique identifier for devices on the Internet

IP addresses as device identifiers. They’re not website names (a) or passwords (d).