ComNet

Which of the following statements is TRUE regarding serial and parallel transmission?

• Parallel transmission is always faster than serial transmission

• Serial transmission is more reliable over long distances than parallel transmission

• Serial transmission is only used for short distances

• Parallel transmission does not suffer from crosstalk

What type of serial transmission uses separate clocks for sender and receiver, relying on start and stop bits for synchronization?

• Synchronous

• Asynchronous

• Isochronous

• Differential

The LLC (Logical Link Control) sublayer provides which of the following functionalities?

• Media access control

• Error detection and flow control

• Physical addressing

• Routing of packets between networks

Which of the following is a responsibility of the MAC (Media Access Control) sublayer?

• Assigning logical addresses

• Controlling access to the transmission medium

• Encrypting data before transmission

• Error detection and flow control

Which of the following is NOT a data link control protocol?

• HDLC

• PPP

• CSMA/CD

• FTP

In which of the following scenarios is flow control most necessary?

• When the sender and receiver have equal processing speeds

• When data packets are always of fixed size

• When the sender transmits data faster than the receiver can process

• When error detection is not required

HDLC uses which type of frame structure?

• Fixed-length frames

• Variable-length frames with bit stuffing

• Variable-length frames with byte stuffing

• Packets with CRC but no frame boundaries

What is the primary function of the flag sequence in HDLC?

• Identifying the sender of the frame

• Providing encryption for secure communication

• Marking the beginning and end of a frame

• Counting the number of frames sent

In HDLC, what is the purpose of bit stuffing?

• To ensure a continuous flow of data

• To avoid misinterpretation of flag sequences within the frame

• To convert asynchronous data to synchronous format