CENG210_Lec_01

Which of the following best defines data communication?

• Data transmission over the internet
• Communication between devices using wires only
• Exchange of data between devices via transmission medium
• Voice communication using mobile phones

Which of the following is NOT one of the four fundamental characteristics of effective data communication?

• Delivery
• Accuracy
• Jitter

• Speed

What is the role of a sender in data communication?

• Routes the message
• Initiates the data transfer
• Receives the message
• Encodes the message only

What is a protocol in the context of data communication?

• A format for presenting user data
• A software used for encryption
• A set of rules governing communication
• A physical medium for transmission

In which transmission mode do both devices communicate simultaneously?

• Simplex
• Half-duplex
• Full-duplex
• Serial

Which of the following statements is true about half-duplex communication?

• Only one device can transmit at a time

• Devices can transmit and receive at the same time

• Communication is always unidirectional
• It uses more bandwidth than full-duplex

Which of the following metrics is not typically used to evaluate network reliability?

• Frequency of failure
• Time to recover from failure
• Bandwidth
• Accuracy of delivery

Which criterion focuses on protecting data from unauthorized access and damage?

• Reliability
• Performance
• Jitter
• Security

Which connection type uses a dedicated link between two devices?

• Multipoint
• Broadcast
• Point-to-point
• Half-duplex

In a multipoint connection, how is channel capacity typically shared?

• By encrypting the channel
• Through point-to-point tunneling
• Either spatially or temporally
• Using only microwave links