III IT A DCCN Lab Quiz-1 (Batch-1&2)

Error detection at the data link layer is achieved by?

• Bit stuffing

• Cyclic redundancy codes

• Hamming codes

• Equalization

Switch is a Device of _________ Layer of OSI Model.

• Network Layer

• Data Link Layer

• Application Layer

• Session Layer

The data link layer takes the packets from _____ and encapsulates them into frames for transmission.

• network layer

• physical layer

• transport layer

• application layer

Which one of the following task is not done by data link layer?

• framing

• error control

• flow control

• channel coding

hen 2 or more bits in a data unit has been changed during the transmission, the error is called

• random error

• burst error

• inverted error

• none of the mentioned

Which error detection method uses one's complement arithmetic?

• Simple parity check

• Two-dimensional parity check

• CRC

• Checksum

The ________ between two words is the number of differences between corresponding bits.

• Hamming code

• Hamming distance

• Hamming rule

• none of the above

The sharing of a medium and its link by two or more devices is called _________

• Fully duplexing

• Multiplexing

• Micropleixng

• Duplexing

Which multiplexing technique used to transmit digital signals?

• FDM

• TDM

• WDM

• FDM & WDM

The required resources for communication between end systems are reserved for the duration of the session between end systems in ________ method.

• Packet switching

• Circuit switching

• Line switching

• Frequency switching