Data Communication and Computer Network
Data-link Control & Protocols
Q. In the _________ method, after the station finds the line idle, it sends its frame immediately. If the line is not idle, it continuously senses the line until it finds it idle.
A.  nonpersistent B.  1-persistent C.  p-persistent D.  none of the above
Similar Questions
1. In a Go-Back-N ARQ, if the window size is 63, what is the range of sequence numbers?
A.  0 to 63 B.  0 to 64 C.  1 to 63 D.  1 to 64
2. In Go-Back-N ARQ, if frames 4, 5, and 6 are received successfully, the receiver may send an ACK _______ to the sender.
A.  5 B.  6 C.  7 D.  any of the above
3. ARQ stands for _______.
A.  Automatic repeat quantization B.  Automatic repeat request C.  Automatic retransmission request D.  Acknowledge repeat request
4. For Stop-and-Wait ARQ, for 10 data packets sent, _______ acknowledgments are needed
A.  exactly 10 B.  less than 10 C.  more than 10 D.  none of the above
5. HDLC is an acronym for _______
A.  High-duplex line communication B.  High-level data link control C.  Half-duplex digital link combination D.  Host double-level circuit
6. Data link control deals with the design and procedures for ______ communication
A.  node-to-node B.  host-to-host C.  process-to-process D.  none of the above
7. ______ in the data link layer separates a message from one source to a destination, or from other messages going from other sources to other destinations
A.  Digitizing B.  Controlling C.  Framing D.  none of the above
8. In _______ framing, there is no need for defining the boundaries of frames.
A.  fixed-size B.  variable-size C.  standard D.  none of the above
9. In ________ framing, we need a delimiter (flag) to define the boundary of two frames.
A.  fixed-size B.  variable-size C.  standard D.  none of the above
10. . _________framing uses two categories of protocols: character-oriented and bit-oriented.
A.  Fixed-size B.  Variable-size C.  Standard D.  None of the above
DATA COMMUNICATION AND COMPUTER NETWORK TOPICS