Data communication 1

Which of the following is NOT a component of a communication system?

• Transmitter

• Receiver

• Transmission Medium

• Compiler

Which topology connects all devices in a network to a single central hub?

• Bus

• Star

• Ring

• Mesh

What is the primary purpose of modulation in data communication?

• Error detection

• Data encryption

• Transmission of signals over long distances

• Improving bandwidth utilization

In which layer of the OSI model does error detection occur?

• Physical Layer

• Data Link Layer

• Network Layer

• Transport Layer

What type of signal is used in analog communication?

• Continuous

• Discrete

• Binary

• Encoded

Which of the following devices is used to amplify signals in a communication system?

• Router

• Repeater

• Switch

• Hub

Which protocol is used to send emails?

• FTP

• SMTP

• HTTP

• SNMP

Which of the following is NOT an example of guided media?

• Twisted-pair cable

• Coaxial cable

• Fiber optic cable

• Radio waves

What does 'bandwidth' refer to in data communication?

• The amount of data transmitted per second

• The number of devices connected to a network

• The delay in transmitting data

• The number of bits in a signal

What type of multiplexing is used in optical fiber communication?

• TDM (Time Division Multiplexing)

• FDM (Frequency Division Multiplexing)

• WDM (Wavelength Division Multiplexing)

• CDM (Code Division Multiplexing)