Quiz on Bit Stuffing and HDLC

What does the bit-oriented approach view frames as?

• A collection of bits

• A collection of characters

• A collection of bytes

• A collection of packets

What is the well-known bit-oriented protocol mentioned in the text?

• HDLC

• UDP

• IP

• TCP

How many bits is the beginning sequence in HDLC?

• 8 bits

• 16 bits

• 32 bits

• 4 bits

What follows the variable length body in an HDLC frame?

• Header

• Ending sequence

• CRC

• Beginning sequence

What is the problem when a bit pattern in the data resembles the beginning or ending sequence?

• Data loss

• Framing error

• Transmission delay

• Data corruption

What is the solution to the problem of framing errors in HDLC?

• Bit stuffing

• Data encryption

• Packet fragmentation

• Error correction codes

What happens when five consecutive ones are detected in the data?

• The transmission is halted

• The data is discarded

• A zero is stuffed

• A one is stuffed

What does the receiver do when it finds a zero after five consecutive ones?

• Adds another zero

• Sends an error message

• Stops the transmission

• Removes the zero

What is the purpose of bit stuffing?

• To compress data

• To increase data size

• To prevent framing errors

• To enhance security

What is the length of the CRC in an HDLC frame?

• 8 bits

• 16 bits

• 4 bits

• 32 bits