Which of the following statements is incorrect?
A. Multiplexers are designed to accept data from several I/O devices and transmit a unified stream of data on one communication line.
B. HDLC is a standard synchronous communication protocol.
C. RTS/CTS is the way the DTE indicates that it is ready to transmit data and the way the DCE indicates that it is ready to accept data.
D. RTS/CTS is the way the terminal indicates ringing
E. None of the above
Answer: Option D
A. Agreements on how communication components and DTE
B. Logical communication channels used for transferri
C. Physical communication channels used for transferr
D. None of the above
The method of communication in which transmission takes place in both directions, but only one direction at a time is called
B. Four wire circuit
C. Full Duplex
D. Half Duplex
Error detection at the data link level is achieved by
A. Bit Stuffing
B. Cyclic Redundancy Code
C. Hamming Code
Which of the following is a wrong example of network layer?
A. Internet Protocol (IP) - ARPANET
B. X.25 Packet Level Protocol (PLP)-ISO
C. Source routing and domain naming-USENet
D. X.25 level 2-ISO
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