UNIT 3- DATA COMMUNICATION

What is a Local Area Network (LAN)?

• A type of wireless network only

• A network that covers a large area

• A group of linked computers in small space

• A network that connects multiple cities

Which of the following is a characteristic of Wide Area Networks (WANs)?

• They are limited to a single building

• They use telephone lines or mobile systems for connection

• They are always wireless

• They cannot include LANs

In a star network system, how are computers connected?

• Each computer is connected to a central server

• All computers are connected in a loop

• They are connected through a central cable

• Each computer connects to every other computer directly

What is the main advantage of a mesh network?

• If one connection breaks, data can use other connections

• It is the easiest to set up

• It requires less hardware

• It is always faster than other networks

What role do servers play in a client-server system?

• They connect computers in a network

• They store data and serve websites

• They are the devices that request data

• They are always mobile devices

What technology allows devices to read car registration numbers from photographs?

• Wi-Fi

• Bluetooth

• Optical Character Recognition (OCR)

• GPS

What happens if the accelerometer in the device detects a fall?

• It sends a message to the control center

• It automatically shuts down

• It starts recording video

• It sends a message to the user

How do customized devices help traffic wardens?

• They allow for manual data entry

• They are used for communication with the public

• They can take photographs and tag them with location and time

• They connect to other traffic wardens

What is one of the main benefits of keeping data electronically?

• It requires more physical storage space

• It allows for easier data retrieval

• It increases record keeping costs

• It is more difficult to access

What is the purpose of a client program in a client-server system?

• To store data

• To request data from the server

• To connect multiple servers

• To manage network connections